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Finding the Fourth Proportional to 1,125.66, 1,553.94 and 677.73

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Solution

The fourth proportional to 1,125.66, 1,553.94 and 677.73 is: 935.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.66 : 1,553.94 = 677.73 : x
  2. Step 2: Convert to fraction form
    1,125.66/1,553.94 = 677.73/x
  3. Step 3: Cross multiply
    1,125.66x = 1,553.94 × 677.73
  4. Step 4: Simplify right side
    1,125.66x = 1,053,151.76
  5. Step 5: Solve for x
    x = 1,053,151.76/1,125.66
  6. Step 6: Final answer
    x = 935.59

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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.