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Finding the Fourth Proportional to 486,342.20, 729,167.70 and 220,230.20

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Solution

The fourth proportional to 486,342.20, 729,167.70 and 220,230.20 is: 330,188.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,342.20 : 729,167.70 = 220,230.20 : x
  2. Step 2: Convert to fraction form
    486,342.20/729,167.70 = 220,230.20/x
  3. Step 3: Cross multiply
    486,342.20x = 729,167.70 × 220,230.20
  4. Step 4: Simplify right side
    486,342.20x = 160,584,748,404.54
  5. Step 5: Solve for x
    x = 160,584,748,404.54/486,342.20
  6. Step 6: Final answer
    x = 330,188.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.