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Finding the Fourth Proportional to 725,266.20, 1,000,807.20 and 398,562.03

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Solution

The fourth proportional to 725,266.20, 1,000,807.20 and 398,562.03 is: 549,982.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,266.20 : 1,000,807.20 = 398,562.03 : x
  2. Step 2: Convert to fraction form
    725,266.20/1,000,807.20 = 398,562.03/x
  3. Step 3: Cross multiply
    725,266.20x = 1,000,807.20 × 398,562.03
  4. Step 4: Simplify right side
    725,266.20x = 398,883,753,023.64
  5. Step 5: Solve for x
    x = 398,883,753,023.64/725,266.20
  6. Step 6: Final answer
    x = 549,982.55

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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.