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Finding the Fourth Proportional to 331,709.40, 497,628.90 and 131,995.80

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Solution

The fourth proportional to 331,709.40, 497,628.90 and 131,995.80 is: 198,019.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,709.40 : 497,628.90 = 131,995.80 : x
  2. Step 2: Convert to fraction form
    331,709.40/497,628.90 = 131,995.80/x
  3. Step 3: Cross multiply
    331,709.40x = 497,628.90 × 131,995.80
  4. Step 4: Simplify right side
    331,709.40x = 65,684,924,758.62
  5. Step 5: Solve for x
    x = 65,684,924,758.62/331,709.40
  6. Step 6: Final answer
    x = 198,019.49

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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.