Home / 1,281,418,778.08-1,768,426,574.01-716,869,981.78

Finding the Fourth Proportional to 1,281,418,778.08, 1,768,426,574.01 and 716,869,981.78

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Solution

The fourth proportional to 1,281,418,778.08, 1,768,426,574.01 and 716,869,981.78 is: 989,318,985.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,281,418,778.08 : 1,768,426,574.01 = 716,869,981.78 : x
  2. Step 2: Convert to fraction form
    1,281,418,778.08/1,768,426,574.01 = 716,869,981.78/x
  3. Step 3: Cross multiply
    1,281,418,778.08x = 1,768,426,574.01 × 716,869,981.78
  4. Step 4: Simplify right side
    1,281,418,778.08x = 1,267,731,925,889,816,576
  5. Step 5: Solve for x
    x = 1,267,731,925,889,816,576/1,281,418,778.08
  6. Step 6: Final answer
    x = 989,318,985.78

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Double scale
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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.