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Finding the Fourth Proportional to 1,127.68, 1,691.40 and 306.04

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Solution

The fourth proportional to 1,127.68, 1,691.40 and 306.04 is: 459.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.68 : 1,691.40 = 306.04 : x
  2. Step 2: Convert to fraction form
    1,127.68/1,691.40 = 306.04/x
  3. Step 3: Cross multiply
    1,127.68x = 1,691.40 × 306.04
  4. Step 4: Simplify right side
    1,127.68x = 517,636.06
  5. Step 5: Solve for x
    x = 517,636.06/1,127.68
  6. Step 6: Final answer
    x = 459.03

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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.