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Finding the Fourth Proportional to 326,553.90, 489,830.85 and 243,609.90

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Solution

The fourth proportional to 326,553.90, 489,830.85 and 243,609.90 is: 365,414.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,553.90 : 489,830.85 = 243,609.90 : x
  2. Step 2: Convert to fraction form
    326,553.90/489,830.85 = 243,609.90/x
  3. Step 3: Cross multiply
    326,553.90x = 489,830.85 × 243,609.90
  4. Step 4: Simplify right side
    326,553.90x = 119,327,644,385.42
  5. Step 5: Solve for x
    x = 119,327,644,385.42/326,553.90
  6. Step 6: Final answer
    x = 365,414.85

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Similar ratio
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1.5x scale

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.