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Finding the Fourth Proportional to 493,315.20, 739,972.80 and 392,931.90

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Solution

The fourth proportional to 493,315.20, 739,972.80 and 392,931.90 is: 589,397.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,315.20 : 739,972.80 = 392,931.90 : x
  2. Step 2: Convert to fraction form
    493,315.20/739,972.80 = 392,931.90/x
  3. Step 3: Cross multiply
    493,315.20x = 739,972.80 × 392,931.90
  4. Step 4: Simplify right side
    493,315.20x = 290,758,918,252.32
  5. Step 5: Solve for x
    x = 290,758,918,252.32/493,315.20
  6. Step 6: Final answer
    x = 589,397.85

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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.