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Finding the Fourth Proportional to 499,393.20, 749,089.80 and 331,431.60

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Solution

The fourth proportional to 499,393.20, 749,089.80 and 331,431.60 is: 497,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,393.20 : 749,089.80 = 331,431.60 : x
  2. Step 2: Convert to fraction form
    499,393.20/749,089.80 = 331,431.60/x
  3. Step 3: Cross multiply
    499,393.20x = 749,089.80 × 331,431.60
  4. Step 4: Simplify right side
    499,393.20x = 248,272,030,957.68
  5. Step 5: Solve for x
    x = 248,272,030,957.68/499,393.20
  6. Step 6: Final answer
    x = 497,147.40

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Similar ratio
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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.