Home / 1,318,412,841.12-1,819,411,713.74-715,583,680.40

Finding the Fourth Proportional to 1,318,412,841.12, 1,819,411,713.74 and 715,583,680.40

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Solution

The fourth proportional to 1,318,412,841.12, 1,819,411,713.74 and 715,583,680.40 is: 987,506,560.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,412,841.12 : 1,819,411,713.74 = 715,583,680.40 : x
  2. Step 2: Convert to fraction form
    1,318,412,841.12/1,819,411,713.74 = 715,583,680.40/x
  3. Step 3: Cross multiply
    1,318,412,841.12x = 1,819,411,713.74 × 715,583,680.40
  4. Step 4: Simplify right side
    1,318,412,841.12x = 1,301,941,330,280,940,288
  5. Step 5: Solve for x
    x = 1,301,941,330,280,940,288/1,318,412,841.12
  6. Step 6: Final answer
    x = 987,506,560.67

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Double scale
Find fourth proportional to 1,318,412,842.12, 1,819,411,715.12 and 715,583,681.40
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.