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Finding the Fourth Proportional to 1,838.25, 2,756.61 and 667.97

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Solution

The fourth proportional to 1,838.25, 2,756.61 and 667.97 is: 1,001.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,838.25 : 2,756.61 = 667.97 : x
  2. Step 2: Convert to fraction form
    1,838.25/2,756.61 = 667.97/x
  3. Step 3: Cross multiply
    1,838.25x = 2,756.61 × 667.97
  4. Step 4: Simplify right side
    1,838.25x = 1,841,332.78
  5. Step 5: Solve for x
    x = 1,841,332.78/1,838.25
  6. Step 6: Final answer
    x = 1,001.68

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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.