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Finding the Fourth Proportional to 693,390.76, 956,860.92 and 387,469.65

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Solution

The fourth proportional to 693,390.76, 956,860.92 and 387,469.65 is: 534,697.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,390.76 : 956,860.92 = 387,469.65 : x
  2. Step 2: Convert to fraction form
    693,390.76/956,860.92 = 387,469.65/x
  3. Step 3: Cross multiply
    693,390.76x = 956,860.92 × 387,469.65
  4. Step 4: Simplify right side
    693,390.76x = 370,754,569,359.31
  5. Step 5: Solve for x
    x = 370,754,569,359.31/693,390.76
  6. Step 6: Final answer
    x = 534,697.88

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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.