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Finding the Fourth Proportional to 498,419.90, 747,739.20 and 161,403.20

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Solution

The fourth proportional to 498,419.90, 747,739.20 and 161,403.20 is: 242,140.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,419.90 : 747,739.20 = 161,403.20 : x
  2. Step 2: Convert to fraction form
    498,419.90/747,739.20 = 161,403.20/x
  3. Step 3: Cross multiply
    498,419.90x = 747,739.20 × 161,403.20
  4. Step 4: Simplify right side
    498,419.90x = 120,687,499,645.44
  5. Step 5: Solve for x
    x = 120,687,499,645.44/498,419.90
  6. Step 6: Final answer
    x = 242,140.21

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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.