Home / 715,904,687.12-987,834,638.08-402,578,391.24

Finding the Fourth Proportional to 715,904,687.12, 987,834,638.08 and 402,578,391.24

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Solution

The fourth proportional to 715,904,687.12, 987,834,638.08 and 402,578,391.24 is: 555,494,169.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,904,687.12 : 987,834,638.08 = 402,578,391.24 : x
  2. Step 2: Convert to fraction form
    715,904,687.12/987,834,638.08 = 402,578,391.24/x
  3. Step 3: Cross multiply
    715,904,687.12x = 987,834,638.08 × 402,578,391.24
  4. Step 4: Simplify right side
    715,904,687.12x = 397,680,879,408,387,584
  5. Step 5: Solve for x
    x = 397,680,879,408,387,584/715,904,687.12
  6. Step 6: Final answer
    x = 555,494,169.22

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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.