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Finding the Fourth Proportional to 331,402.80, 497,104.20 and 131,656.80

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Solution

The fourth proportional to 331,402.80, 497,104.20 and 131,656.80 is: 197,485.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,402.80 : 497,104.20 = 131,656.80 : x
  2. Step 2: Convert to fraction form
    331,402.80/497,104.20 = 131,656.80/x
  3. Step 3: Cross multiply
    331,402.80x = 497,104.20 × 131,656.80
  4. Step 4: Simplify right side
    331,402.80x = 65,447,148,238.56
  5. Step 5: Solve for x
    x = 65,447,148,238.56/331,402.80
  6. Step 6: Final answer
    x = 197,485.20

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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.