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Finding the Fourth Proportional to 331,607.30, 497,447.40 and 121,290.80

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Solution

The fourth proportional to 331,607.30, 497,447.40 and 121,290.80 is: 181,949.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,607.30 : 497,447.40 = 121,290.80 : x
  2. Step 2: Convert to fraction form
    331,607.30/497,447.40 = 121,290.80/x
  3. Step 3: Cross multiply
    331,607.30x = 497,447.40 × 121,290.80
  4. Step 4: Simplify right side
    331,607.30x = 60,335,793,103.92
  5. Step 5: Solve for x
    x = 60,335,793,103.92/331,607.30
  6. Step 6: Final answer
    x = 181,949.53

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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.