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Finding the Fourth Proportional to 330,607.78, 495,944.46 and 131,065.90

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Solution

The fourth proportional to 330,607.78, 495,944.46 and 131,065.90 is: 196,611.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,607.78 : 495,944.46 = 131,065.90 : x
  2. Step 2: Convert to fraction form
    330,607.78/495,944.46 = 131,065.90/x
  3. Step 3: Cross multiply
    330,607.78x = 495,944.46 × 131,065.90
  4. Step 4: Simplify right side
    330,607.78x = 65,001,406,999.91
  5. Step 5: Solve for x
    x = 65,001,406,999.91/330,607.78
  6. Step 6: Final answer
    x = 196,611.85

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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.