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Finding the Fourth Proportional to 542,427.70, 813,641.55 and 148,443.70

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Solution

The fourth proportional to 542,427.70, 813,641.55 and 148,443.70 is: 222,665.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,427.70 : 813,641.55 = 148,443.70 : x
  2. Step 2: Convert to fraction form
    542,427.70/813,641.55 = 148,443.70/x
  3. Step 3: Cross multiply
    542,427.70x = 813,641.55 × 148,443.70
  4. Step 4: Simplify right side
    542,427.70x = 120,779,962,155.74
  5. Step 5: Solve for x
    x = 120,779,962,155.74/542,427.70
  6. Step 6: Final answer
    x = 222,665.55

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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.