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Finding the Fourth Proportional to 498,403.88, 687,705.36 and 283,531.40

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Solution

The fourth proportional to 498,403.88, 687,705.36 and 283,531.40 is: 391,221.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,403.88 : 687,705.36 = 283,531.40 : x
  2. Step 2: Convert to fraction form
    498,403.88/687,705.36 = 283,531.40/x
  3. Step 3: Cross multiply
    498,403.88x = 687,705.36 × 283,531.40
  4. Step 4: Simplify right side
    498,403.88x = 194,986,063,508.30
  5. Step 5: Solve for x
    x = 194,986,063,508.30/498,403.88
  6. Step 6: Final answer
    x = 391,221.00

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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.