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Finding the Fourth Proportional to 498,081.60, 747,122.40 and 320,788.80

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Solution

The fourth proportional to 498,081.60, 747,122.40 and 320,788.80 is: 481,183.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,081.60 : 747,122.40 = 320,788.80 : x
  2. Step 2: Convert to fraction form
    498,081.60/747,122.40 = 320,788.80/x
  3. Step 3: Cross multiply
    498,081.60x = 747,122.40 × 320,788.80
  4. Step 4: Simplify right side
    498,081.60x = 239,668,498,149.12
  5. Step 5: Solve for x
    x = 239,668,498,149.12/498,081.60
  6. Step 6: Final answer
    x = 481,183.20

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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.