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Finding the Fourth Proportional to 331,700.40, 497,615.40 and 131,986.80

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Solution

The fourth proportional to 331,700.40, 497,615.40 and 131,986.80 is: 198,005.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,700.40 : 497,615.40 = 131,986.80 : x
  2. Step 2: Convert to fraction form
    331,700.40/497,615.40 = 131,986.80/x
  3. Step 3: Cross multiply
    331,700.40x = 497,615.40 × 131,986.80
  4. Step 4: Simplify right side
    331,700.40x = 65,678,664,276.72
  5. Step 5: Solve for x
    x = 65,678,664,276.72/331,700.40
  6. Step 6: Final answer
    x = 198,005.98

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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.