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Finding the Fourth Proportional to 499,419.80, 749,129.70 and 331,458.20

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Solution

The fourth proportional to 499,419.80, 749,129.70 and 331,458.20 is: 497,187.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,419.80 : 749,129.70 = 331,458.20 : x
  2. Step 2: Convert to fraction form
    499,419.80/749,129.70 = 331,458.20/x
  3. Step 3: Cross multiply
    499,419.80x = 749,129.70 × 331,458.20
  4. Step 4: Simplify right side
    499,419.80x = 248,305,181,928.54
  5. Step 5: Solve for x
    x = 248,305,181,928.54/499,419.80
  6. Step 6: Final answer
    x = 497,187.30

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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.