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Finding the Fourth Proportional to 486,073.20, 729,109.80 and 326,640.90

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Solution

The fourth proportional to 486,073.20, 729,109.80 and 326,640.90 is: 489,961.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,073.20 : 729,109.80 = 326,640.90 : x
  2. Step 2: Convert to fraction form
    486,073.20/729,109.80 = 326,640.90/x
  3. Step 3: Cross multiply
    486,073.20x = 729,109.80 × 326,640.90
  4. Step 4: Simplify right side
    486,073.20x = 238,157,081,270.82
  5. Step 5: Solve for x
    x = 238,157,081,270.82/486,073.20
  6. Step 6: Final answer
    x = 489,961.35

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Similar ratio
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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.