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Finding the Fourth Proportional to 941.38, 1,299.54 and 627.20

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Solution

The fourth proportional to 941.38, 1,299.54 and 627.20 is: 865.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.38 : 1,299.54 = 627.20 : x
  2. Step 2: Convert to fraction form
    941.38/1,299.54 = 627.20/x
  3. Step 3: Cross multiply
    941.38x = 1,299.54 × 627.20
  4. Step 4: Simplify right side
    941.38x = 815,071.49
  5. Step 5: Solve for x
    x = 815,071.49/941.38
  6. Step 6: Final answer
    x = 865.83

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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.