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Finding the Fourth Proportional to 667,141.40, 1,000,703.12 and 161,706.72

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Solution

The fourth proportional to 667,141.40, 1,000,703.12 and 161,706.72 is: 242,557.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,141.40 : 1,000,703.12 = 161,706.72 : x
  2. Step 2: Convert to fraction form
    667,141.40/1,000,703.12 = 161,706.72/x
  3. Step 3: Cross multiply
    667,141.40x = 1,000,703.12 × 161,706.72
  4. Step 4: Simplify right side
    667,141.40x = 161,820,419,228.97
  5. Step 5: Solve for x
    x = 161,820,419,228.97/667,141.40
  6. Step 6: Final answer
    x = 242,557.90

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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.