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Finding the Fourth Proportional to 499,447.80, 749,171.70 and 331,486.20

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Solution

The fourth proportional to 499,447.80, 749,171.70 and 331,486.20 is: 497,229.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,447.80 : 749,171.70 = 331,486.20 : x
  2. Step 2: Convert to fraction form
    499,447.80/749,171.70 = 331,486.20/x
  3. Step 3: Cross multiply
    499,447.80x = 749,171.70 × 331,486.20
  4. Step 4: Simplify right side
    499,447.80x = 248,340,079,980.54
  5. Step 5: Solve for x
    x = 248,340,079,980.54/499,447.80
  6. Step 6: Final answer
    x = 497,229.30

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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.