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Finding the Fourth Proportional to 331,698.90, 497,613.15 and 131,985.30

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Solution

The fourth proportional to 331,698.90, 497,613.15 and 131,985.30 is: 198,003.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,698.90 : 497,613.15 = 131,985.30 : x
  2. Step 2: Convert to fraction form
    331,698.90/497,613.15 = 131,985.30/x
  3. Step 3: Cross multiply
    331,698.90x = 497,613.15 × 131,985.30
  4. Step 4: Simplify right side
    331,698.90x = 65,677,620,886.70
  5. Step 5: Solve for x
    x = 65,677,620,886.70/331,698.90
  6. Step 6: Final answer
    x = 198,003.73

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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.