Home / 1,126.40-1,553.46-939.38

Finding the Fourth Proportional to 1,126.40, 1,553.46 and 939.38

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Solution

The fourth proportional to 1,126.40, 1,553.46 and 939.38 is: 1,295.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.40 : 1,553.46 = 939.38 : x
  2. Step 2: Convert to fraction form
    1,126.40/1,553.46 = 939.38/x
  3. Step 3: Cross multiply
    1,126.40x = 1,553.46 × 939.38
  4. Step 4: Simplify right side
    1,126.40x = 1,459,289.25
  5. Step 5: Solve for x
    x = 1,459,289.25/1,126.40
  6. Step 6: Final answer
    x = 1,295.53

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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.