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Finding the Fourth Proportional to 709,951.80, 979,737.08 and 387,661.89

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Solution

The fourth proportional to 709,951.80, 979,737.08 and 387,661.89 is: 534,975.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,951.80 : 979,737.08 = 387,661.89 : x
  2. Step 2: Convert to fraction form
    709,951.80/979,737.08 = 387,661.89/x
  3. Step 3: Cross multiply
    709,951.80x = 979,737.08 × 387,661.89
  4. Step 4: Simplify right side
    709,951.80x = 379,806,726,197.57
  5. Step 5: Solve for x
    x = 379,806,726,197.57/709,951.80
  6. Step 6: Final answer
    x = 534,975.37

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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.