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Finding the Fourth Proportional to 391,370.68, 539,969.16 and 219,265.60

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Solution

The fourth proportional to 391,370.68, 539,969.16 and 219,265.60 is: 302,517.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,370.68 : 539,969.16 = 219,265.60 : x
  2. Step 2: Convert to fraction form
    391,370.68/539,969.16 = 219,265.60/x
  3. Step 3: Cross multiply
    391,370.68x = 539,969.16 × 219,265.60
  4. Step 4: Simplify right side
    391,370.68x = 118,396,661,848.90
  5. Step 5: Solve for x
    x = 118,396,661,848.90/391,370.68
  6. Step 6: Final answer
    x = 302,517.97

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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.