Home / 1,120.13-1,545.35-677.87

Finding the Fourth Proportional to 1,120.13, 1,545.35 and 677.87

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Solution

The fourth proportional to 1,120.13, 1,545.35 and 677.87 is: 935.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.13 : 1,545.35 = 677.87 : x
  2. Step 2: Convert to fraction form
    1,120.13/1,545.35 = 677.87/x
  3. Step 3: Cross multiply
    1,120.13x = 1,545.35 × 677.87
  4. Step 4: Simplify right side
    1,120.13x = 1,047,541.08
  5. Step 5: Solve for x
    x = 1,047,541.08/1,120.13
  6. Step 6: Final answer
    x = 935.20

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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.