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Finding the Fourth Proportional to 1,000.18, 1,500.20 and 269.74

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Solution

The fourth proportional to 1,000.18, 1,500.20 and 269.74 is: 404.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,000.18 : 1,500.20 = 269.74 : x
  2. Step 2: Convert to fraction form
    1,000.18/1,500.20 = 269.74/x
  3. Step 3: Cross multiply
    1,000.18x = 1,500.20 × 269.74
  4. Step 4: Simplify right side
    1,000.18x = 404,663.95
  5. Step 5: Solve for x
    x = 404,663.95/1,000.18
  6. Step 6: Final answer
    x = 404.59

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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.