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Finding the Fourth Proportional to 1,011.51, 1,517.33 and 271.11

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Solution

The fourth proportional to 1,011.51, 1,517.33 and 271.11 is: 406.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.51 : 1,517.33 = 271.11 : x
  2. Step 2: Convert to fraction form
    1,011.51/1,517.33 = 271.11/x
  3. Step 3: Cross multiply
    1,011.51x = 1,517.33 × 271.11
  4. Step 4: Simplify right side
    1,011.51x = 411,363.34
  5. Step 5: Solve for x
    x = 411,363.34/1,011.51
  6. Step 6: Final answer
    x = 406.68

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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.