Home / 715,904,470.64-987,834,339.17-402,578,174.77

Finding the Fourth Proportional to 715,904,470.64, 987,834,339.17 and 402,578,174.77

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Solution

The fourth proportional to 715,904,470.64, 987,834,339.17 and 402,578,174.77 is: 555,493,870.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,904,470.64 : 987,834,339.17 = 402,578,174.77 : x
  2. Step 2: Convert to fraction form
    715,904,470.64/987,834,339.17 = 402,578,174.77/x
  3. Step 3: Cross multiply
    715,904,470.64x = 987,834,339.17 × 402,578,174.77
  4. Step 4: Simplify right side
    715,904,470.64x = 397,680,545,238,187,712
  5. Step 5: Solve for x
    x = 397,680,545,238,187,712/715,904,470.64
  6. Step 6: Final answer
    x = 555,493,870.41

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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.