Home / 1,120.38-1,542.69-1,117.14

Finding the Fourth Proportional to 1,120.38, 1,542.69 and 1,117.14

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Solution

The fourth proportional to 1,120.38, 1,542.69 and 1,117.14 is: 1,538.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.38 : 1,542.69 = 1,117.14 : x
  2. Step 2: Convert to fraction form
    1,120.38/1,542.69 = 1,117.14/x
  3. Step 3: Cross multiply
    1,120.38x = 1,542.69 × 1,117.14
  4. Step 4: Simplify right side
    1,120.38x = 1,723,400.71
  5. Step 5: Solve for x
    x = 1,723,400.71/1,120.38
  6. Step 6: Final answer
    x = 1,538.23

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Half scale
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Double scale
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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.