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Finding the Fourth Proportional to 1,008.27, 1,391.51 and 677.39

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Solution

The fourth proportional to 1,008.27, 1,391.51 and 677.39 is: 934.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.27 : 1,391.51 = 677.39 : x
  2. Step 2: Convert to fraction form
    1,008.27/1,391.51 = 677.39/x
  3. Step 3: Cross multiply
    1,008.27x = 1,391.51 × 677.39
  4. Step 4: Simplify right side
    1,008.27x = 942,589.69
  5. Step 5: Solve for x
    x = 942,589.69/1,008.27
  6. Step 6: Final answer
    x = 934.86

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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.