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Finding the Fourth Proportional to 655,999.20, 984,387.60 and 432,001.80

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Solution

The fourth proportional to 655,999.20, 984,387.60 and 432,001.80 is: 648,258.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,999.20 : 984,387.60 = 432,001.80 : x
  2. Step 2: Convert to fraction form
    655,999.20/984,387.60 = 432,001.80/x
  3. Step 3: Cross multiply
    655,999.20x = 984,387.60 × 432,001.80
  4. Step 4: Simplify right side
    655,999.20x = 425,257,215,097.68
  5. Step 5: Solve for x
    x = 425,257,215,097.68/655,999.20
  6. Step 6: Final answer
    x = 648,258.74

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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.