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Finding the Fourth Proportional to 331,456.40, 497,249.40 and 131,742.80

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Solution

The fourth proportional to 331,456.40, 497,249.40 and 131,742.80 is: 197,639.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,456.40 : 497,249.40 = 131,742.80 : x
  2. Step 2: Convert to fraction form
    331,456.40/497,249.40 = 131,742.80/x
  3. Step 3: Cross multiply
    331,456.40x = 497,249.40 × 131,742.80
  4. Step 4: Simplify right side
    331,456.40x = 65,509,028,254.32
  5. Step 5: Solve for x
    x = 65,509,028,254.32/331,456.40
  6. Step 6: Final answer
    x = 197,639.96

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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.