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Finding the Fourth Proportional to 542,431.20, 813,646.80 and 148,447.20

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Solution

The fourth proportional to 542,431.20, 813,646.80 and 148,447.20 is: 222,670.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,431.20 : 813,646.80 = 148,447.20 : x
  2. Step 2: Convert to fraction form
    542,431.20/813,646.80 = 148,447.20/x
  3. Step 3: Cross multiply
    542,431.20x = 813,646.80 × 148,447.20
  4. Step 4: Simplify right side
    542,431.20x = 120,783,589,248.96
  5. Step 5: Solve for x
    x = 120,783,589,248.96/542,431.20
  6. Step 6: Final answer
    x = 222,670.80

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Double scale
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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.