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Finding the Fourth Proportional to 709,765.65, 979,491.42 and 387,489.33

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Solution

The fourth proportional to 709,765.65, 979,491.42 and 387,489.33 is: 534,743.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,765.65 : 979,491.42 = 387,489.33 : x
  2. Step 2: Convert to fraction form
    709,765.65/979,491.42 = 387,489.33/x
  3. Step 3: Cross multiply
    709,765.65x = 979,491.42 × 387,489.33
  4. Step 4: Simplify right side
    709,765.65x = 379,542,474,076.55
  5. Step 5: Solve for x
    x = 379,542,474,076.55/709,765.65
  6. Step 6: Final answer
    x = 534,743.37

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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.