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Finding the Fourth Proportional to 879,303.80, 1,318,955.70 and 520,052.60

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Solution

The fourth proportional to 879,303.80, 1,318,955.70 and 520,052.60 is: 780,078.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,303.80 : 1,318,955.70 = 520,052.60 : x
  2. Step 2: Convert to fraction form
    879,303.80/1,318,955.70 = 520,052.60/x
  3. Step 3: Cross multiply
    879,303.80x = 1,318,955.70 × 520,052.60
  4. Step 4: Simplify right side
    879,303.80x = 685,926,341,069.82
  5. Step 5: Solve for x
    x = 685,926,341,069.82/879,303.80
  6. Step 6: Final answer
    x = 780,078.90

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.