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Finding the Fourth Proportional to 720,722.52, 994,520.97 and 398,380.59

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Solution

The fourth proportional to 720,722.52, 994,520.97 and 398,380.59 is: 549,723.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,722.52 : 994,520.97 = 398,380.59 : x
  2. Step 2: Convert to fraction form
    720,722.52/994,520.97 = 398,380.59/x
  3. Step 3: Cross multiply
    720,722.52x = 994,520.97 × 398,380.59
  4. Step 4: Simplify right side
    720,722.52x = 396,197,850,795.97
  5. Step 5: Solve for x
    x = 396,197,850,795.97/720,722.52
  6. Step 6: Final answer
    x = 549,723.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.