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Finding the Fourth Proportional to 709,761.65, 979,485.90 and 387,485.33

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Solution

The fourth proportional to 709,761.65, 979,485.90 and 387,485.33 is: 534,737.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,761.65 : 979,485.90 = 387,485.33 : x
  2. Step 2: Convert to fraction form
    709,761.65/979,485.90 = 387,485.33/x
  3. Step 3: Cross multiply
    709,761.65x = 979,485.90 × 387,485.33
  4. Step 4: Simplify right side
    709,761.65x = 379,536,417,191.85
  5. Step 5: Solve for x
    x = 379,536,417,191.85/709,761.65
  6. Step 6: Final answer
    x = 534,737.85

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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.