Home / 1,691.22-2,330.99-1,217.82

Finding the Fourth Proportional to 1,691.22, 2,330.99 and 1,217.82

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Solution

The fourth proportional to 1,691.22, 2,330.99 and 1,217.82 is: 1,678.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.22 : 2,330.99 = 1,217.82 : x
  2. Step 2: Convert to fraction form
    1,691.22/2,330.99 = 1,217.82/x
  3. Step 3: Cross multiply
    1,691.22x = 2,330.99 × 1,217.82
  4. Step 4: Simplify right side
    1,691.22x = 2,838,726.24
  5. Step 5: Solve for x
    x = 2,838,726.24/1,691.22
  6. Step 6: Final answer
    x = 1,678.51

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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.