Home / 715,904,680.98-987,834,629.60-402,578,385.10

Finding the Fourth Proportional to 715,904,680.98, 987,834,629.60 and 402,578,385.10

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Solution

The fourth proportional to 715,904,680.98, 987,834,629.60 and 402,578,385.10 is: 555,494,160.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,904,680.98 : 987,834,629.60 = 402,578,385.10 : x
  2. Step 2: Convert to fraction form
    715,904,680.98/987,834,629.60 = 402,578,385.10/x
  3. Step 3: Cross multiply
    715,904,680.98x = 987,834,629.60 × 402,578,385.10
  4. Step 4: Simplify right side
    715,904,680.98x = 397,680,869,930,956,224
  5. Step 5: Solve for x
    x = 397,680,869,930,956,224/715,904,680.98
  6. Step 6: Final answer
    x = 555,494,160.74

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Double scale
Find fourth proportional to 715,904,681.98, 987,834,630.98 and 402,578,386.10
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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.