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Finding the Fourth Proportional to 542,286.60, 813,660.30 and 261,659.40

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Solution

The fourth proportional to 542,286.60, 813,660.30 and 261,659.40 is: 392,600.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,286.60 : 813,660.30 = 261,659.40 : x
  2. Step 2: Convert to fraction form
    542,286.60/813,660.30 = 261,659.40/x
  3. Step 3: Cross multiply
    542,286.60x = 813,660.30 × 261,659.40
  4. Step 4: Simplify right side
    542,286.60x = 212,901,865,901.82
  5. Step 5: Solve for x
    x = 212,901,865,901.82/542,286.60
  6. Step 6: Final answer
    x = 392,600.27

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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.