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Finding the Fourth Proportional to 1,127.84, 1,691.75 and 306.11

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Solution

The fourth proportional to 1,127.84, 1,691.75 and 306.11 is: 459.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.84 : 1,691.75 = 306.11 : x
  2. Step 2: Convert to fraction form
    1,127.84/1,691.75 = 306.11/x
  3. Step 3: Cross multiply
    1,127.84x = 1,691.75 × 306.11
  4. Step 4: Simplify right side
    1,127.84x = 517,861.59
  5. Step 5: Solve for x
    x = 517,861.59/1,127.84
  6. Step 6: Final answer
    x = 459.16

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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.