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Finding the Fourth Proportional to 391,109.64, 539,735.48 and 240,206.64

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Solution

The fourth proportional to 391,109.64, 539,735.48 and 240,206.64 is: 331,487.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,109.64 : 539,735.48 = 240,206.64 : x
  2. Step 2: Convert to fraction form
    391,109.64/539,735.48 = 240,206.64/x
  3. Step 3: Cross multiply
    391,109.64x = 539,735.48 × 240,206.64
  4. Step 4: Simplify right side
    391,109.64x = 129,648,046,139.59
  5. Step 5: Solve for x
    x = 129,648,046,139.59/391,109.64
  6. Step 6: Final answer
    x = 331,487.73

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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.