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Finding the Fourth Proportional to 1,092.68, 1,507.92 and 856.91

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Solution

The fourth proportional to 1,092.68, 1,507.92 and 856.91 is: 1,182.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,092.68 : 1,507.92 = 856.91 : x
  2. Step 2: Convert to fraction form
    1,092.68/1,507.92 = 856.91/x
  3. Step 3: Cross multiply
    1,092.68x = 1,507.92 × 856.91
  4. Step 4: Simplify right side
    1,092.68x = 1,292,151.73
  5. Step 5: Solve for x
    x = 1,292,151.73/1,092.68
  6. Step 6: Final answer
    x = 1,182.55

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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.