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Finding the Fourth Proportional to 1,691.76, 2,333.58 and 1,133.04

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Solution

The fourth proportional to 1,691.76, 2,333.58 and 1,133.04 is: 1,562.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.76 : 2,333.58 = 1,133.04 : x
  2. Step 2: Convert to fraction form
    1,691.76/2,333.58 = 1,133.04/x
  3. Step 3: Cross multiply
    1,691.76x = 2,333.58 × 1,133.04
  4. Step 4: Simplify right side
    1,691.76x = 2,644,039.48
  5. Step 5: Solve for x
    x = 2,644,039.48/1,691.76
  6. Step 6: Final answer
    x = 1,562.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.