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Finding the Fourth Proportional to 499,990.80, 750,139.80 and 394,851.60

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Solution

The fourth proportional to 499,990.80, 750,139.80 and 394,851.60 is: 592,398.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,990.80 : 750,139.80 = 394,851.60 : x
  2. Step 2: Convert to fraction form
    499,990.80/750,139.80 = 394,851.60/x
  3. Step 3: Cross multiply
    499,990.80x = 750,139.80 × 394,851.60
  4. Step 4: Simplify right side
    499,990.80x = 296,193,900,253.68
  5. Step 5: Solve for x
    x = 296,193,900,253.68/499,990.80
  6. Step 6: Final answer
    x = 592,398.70

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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.