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Finding the Fourth Proportional to 542,974.20, 813,659.40 and 393,529.20

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Solution

The fourth proportional to 542,974.20, 813,659.40 and 393,529.20 is: 589,712.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,974.20 : 813,659.40 = 393,529.20 : x
  2. Step 2: Convert to fraction form
    542,974.20/813,659.40 = 393,529.20/x
  3. Step 3: Cross multiply
    542,974.20x = 813,659.40 × 393,529.20
  4. Step 4: Simplify right side
    542,974.20x = 320,198,732,754.48
  5. Step 5: Solve for x
    x = 320,198,732,754.48/542,974.20
  6. Step 6: Final answer
    x = 589,712.61

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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.