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Finding the Fourth Proportional to 1,066.17, 1,471.17 and 667.23

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Solution

The fourth proportional to 1,066.17, 1,471.17 and 667.23 is: 920.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,066.17 : 1,471.17 = 667.23 : x
  2. Step 2: Convert to fraction form
    1,066.17/1,471.17 = 667.23/x
  3. Step 3: Cross multiply
    1,066.17x = 1,471.17 × 667.23
  4. Step 4: Simplify right side
    1,066.17x = 981,608.76
  5. Step 5: Solve for x
    x = 981,608.76/1,066.17
  6. Step 6: Final answer
    x = 920.69

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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.