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Finding the Fourth Proportional to 392,497.80, 588,746.70 and 280,523.40

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Solution

The fourth proportional to 392,497.80, 588,746.70 and 280,523.40 is: 420,785.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,497.80 : 588,746.70 = 280,523.40 : x
  2. Step 2: Convert to fraction form
    392,497.80/588,746.70 = 280,523.40/x
  3. Step 3: Cross multiply
    392,497.80x = 588,746.70 × 280,523.40
  4. Step 4: Simplify right side
    392,497.80x = 165,157,226,022.78
  5. Step 5: Solve for x
    x = 165,157,226,022.78/392,497.80
  6. Step 6: Final answer
    x = 420,785.10

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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.