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Finding the Fourth Proportional to 352,613.12, 528,737.28 and 142,193.92

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Solution

The fourth proportional to 352,613.12, 528,737.28 and 142,193.92 is: 213,217.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,613.12 : 528,737.28 = 142,193.92 : x
  2. Step 2: Convert to fraction form
    352,613.12/528,737.28 = 142,193.92/x
  3. Step 3: Cross multiply
    352,613.12x = 528,737.28 × 142,193.92
  4. Step 4: Simplify right side
    352,613.12x = 75,183,226,493.34
  5. Step 5: Solve for x
    x = 75,183,226,493.34/352,613.12
  6. Step 6: Final answer
    x = 213,217.33

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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.