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Finding the Fourth Proportional to 1,067.76, 1,472.76 and 674.10

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Solution

The fourth proportional to 1,067.76, 1,472.76 and 674.10 is: 929.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.76 : 1,472.76 = 674.10 : x
  2. Step 2: Convert to fraction form
    1,067.76/1,472.76 = 674.10/x
  3. Step 3: Cross multiply
    1,067.76x = 1,472.76 × 674.10
  4. Step 4: Simplify right side
    1,067.76x = 992,787.52
  5. Step 5: Solve for x
    x = 992,787.52/1,067.76
  6. Step 6: Final answer
    x = 929.79

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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.