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Finding the Fourth Proportional to 542,238.80, 813,358.20 and 402,270.80

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Solution

The fourth proportional to 542,238.80, 813,358.20 and 402,270.80 is: 603,406.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,238.80 : 813,358.20 = 402,270.80 : x
  2. Step 2: Convert to fraction form
    542,238.80/813,358.20 = 402,270.80/x
  3. Step 3: Cross multiply
    542,238.80x = 813,358.20 × 402,270.80
  4. Step 4: Simplify right side
    542,238.80x = 327,190,253,800.56
  5. Step 5: Solve for x
    x = 327,190,253,800.56/542,238.80
  6. Step 6: Final answer
    x = 603,406.20

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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.