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Finding the Fourth Proportional to 1,120.13, 1,545.78 and 677.92

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Solution

The fourth proportional to 1,120.13, 1,545.78 and 677.92 is: 935.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.13 : 1,545.78 = 677.92 : x
  2. Step 2: Convert to fraction form
    1,120.13/1,545.78 = 677.92/x
  3. Step 3: Cross multiply
    1,120.13x = 1,545.78 × 677.92
  4. Step 4: Simplify right side
    1,120.13x = 1,047,916.75
  5. Step 5: Solve for x
    x = 1,047,916.75/1,120.13
  6. Step 6: Final answer
    x = 935.53

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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.