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Finding the Fourth Proportional to 1,011.89, 1,517.64 and 281.27

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Solution

The fourth proportional to 1,011.89, 1,517.64 and 281.27 is: 421.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.89 : 1,517.64 = 281.27 : x
  2. Step 2: Convert to fraction form
    1,011.89/1,517.64 = 281.27/x
  3. Step 3: Cross multiply
    1,011.89x = 1,517.64 × 281.27
  4. Step 4: Simplify right side
    1,011.89x = 426,869.34
  5. Step 5: Solve for x
    x = 426,869.34/1,011.89
  6. Step 6: Final answer
    x = 421.85

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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.