Home / 715,904,468.64-987,834,336.41-402,578,172.77

Finding the Fourth Proportional to 715,904,468.64, 987,834,336.41 and 402,578,172.77

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Solution

The fourth proportional to 715,904,468.64, 987,834,336.41 and 402,578,172.77 is: 555,493,867.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,904,468.64 : 987,834,336.41 = 402,578,172.77 : x
  2. Step 2: Convert to fraction form
    715,904,468.64/987,834,336.41 = 402,578,172.77/x
  3. Step 3: Cross multiply
    715,904,468.64x = 987,834,336.41 × 402,578,172.77
  4. Step 4: Simplify right side
    715,904,468.64x = 397,680,542,147,470,528
  5. Step 5: Solve for x
    x = 397,680,542,147,470,528/715,904,468.64
  6. Step 6: Final answer
    x = 555,493,867.64

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Double scale
Find fourth proportional to 715,904,469.64, 987,834,337.79 and 402,578,173.77
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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.