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Finding the Fourth Proportional to 391,140.92, 539,801.34 and 219,062.36

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Solution

The fourth proportional to 391,140.92, 539,801.34 and 219,062.36 is: 302,321.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,140.92 : 539,801.34 = 219,062.36 : x
  2. Step 2: Convert to fraction form
    391,140.92/539,801.34 = 219,062.36/x
  3. Step 3: Cross multiply
    391,140.92x = 539,801.34 × 219,062.36
  4. Step 4: Simplify right side
    391,140.92x = 118,250,155,471.56
  5. Step 5: Solve for x
    x = 118,250,155,471.56/391,140.92
  6. Step 6: Final answer
    x = 302,321.11

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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.