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Finding the Fourth Proportional to 1,065.52, 1,471.16 and 667.34

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Solution

The fourth proportional to 1,065.52, 1,471.16 and 667.34 is: 921.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,065.52 : 1,471.16 = 667.34 : x
  2. Step 2: Convert to fraction form
    1,065.52/1,471.16 = 667.34/x
  3. Step 3: Cross multiply
    1,065.52x = 1,471.16 × 667.34
  4. Step 4: Simplify right side
    1,065.52x = 981,763.91
  5. Step 5: Solve for x
    x = 981,763.91/1,065.52
  6. Step 6: Final answer
    x = 921.39

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1.5x scale

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.