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Finding the Fourth Proportional to 328,432.20, 492,648.30 and 315,310.20

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Solution

The fourth proportional to 328,432.20, 492,648.30 and 315,310.20 is: 472,965.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,432.20 : 492,648.30 = 315,310.20 : x
  2. Step 2: Convert to fraction form
    328,432.20/492,648.30 = 315,310.20/x
  3. Step 3: Cross multiply
    328,432.20x = 492,648.30 × 315,310.20
  4. Step 4: Simplify right side
    328,432.20x = 155,337,034,002.66
  5. Step 5: Solve for x
    x = 155,337,034,002.66/328,432.20
  6. Step 6: Final answer
    x = 472,965.30

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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.