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Finding the Fourth Proportional to 2,691.17, 4,036.76 and 842.30

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Solution

The fourth proportional to 2,691.17, 4,036.76 and 842.30 is: 1,263.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,691.17 : 4,036.76 = 842.30 : x
  2. Step 2: Convert to fraction form
    2,691.17/4,036.76 = 842.30/x
  3. Step 3: Cross multiply
    2,691.17x = 4,036.76 × 842.30
  4. Step 4: Simplify right side
    2,691.17x = 3,400,140.66
  5. Step 5: Solve for x
    x = 3,400,140.66/2,691.17
  6. Step 6: Final answer
    x = 1,263.44

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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.