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Finding the Fourth Proportional to 709,891.92, 979,643.43 and 387,601.02

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Solution

The fourth proportional to 709,891.92, 979,643.43 and 387,601.02 is: 534,885.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,891.92 : 979,643.43 = 387,601.02 : x
  2. Step 2: Convert to fraction form
    709,891.92/979,643.43 = 387,601.02/x
  3. Step 3: Cross multiply
    709,891.92x = 979,643.43 × 387,601.02
  4. Step 4: Simplify right side
    709,891.92x = 379,710,792,704.30
  5. Step 5: Solve for x
    x = 379,710,792,704.30/709,891.92
  6. Step 6: Final answer
    x = 534,885.36

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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.