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Finding the Fourth Proportional to 493,311.20, 739,966.80 and 392,927.90

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Solution

The fourth proportional to 493,311.20, 739,966.80 and 392,927.90 is: 589,391.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,311.20 : 739,966.80 = 392,927.90 : x
  2. Step 2: Convert to fraction form
    493,311.20/739,966.80 = 392,927.90/x
  3. Step 3: Cross multiply
    493,311.20x = 739,966.80 × 392,927.90
  4. Step 4: Simplify right side
    493,311.20x = 290,753,600,793.72
  5. Step 5: Solve for x
    x = 290,753,600,793.72/493,311.20
  6. Step 6: Final answer
    x = 589,391.85

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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.