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Finding the Fourth Proportional to 486,312.31, 729,452.90 and 220,072.83

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Solution

The fourth proportional to 486,312.31, 729,452.90 and 220,072.83 is: 330,102.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,312.31 : 729,452.90 = 220,072.83 : x
  2. Step 2: Convert to fraction form
    486,312.31/729,452.90 = 220,072.83/x
  3. Step 3: Cross multiply
    486,312.31x = 729,452.90 × 220,072.83
  4. Step 4: Simplify right side
    486,312.31x = 160,532,761,869.44
  5. Step 5: Solve for x
    x = 160,532,761,869.44/486,312.31
  6. Step 6: Final answer
    x = 330,102.20

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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.