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Finding the Fourth Proportional to 883.13, 1,321.65 and 635.78

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Solution

The fourth proportional to 883.13, 1,321.65 and 635.78 is: 951.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.13 : 1,321.65 = 635.78 : x
  2. Step 2: Convert to fraction form
    883.13/1,321.65 = 635.78/x
  3. Step 3: Cross multiply
    883.13x = 1,321.65 × 635.78
  4. Step 4: Simplify right side
    883.13x = 840,281.94
  5. Step 5: Solve for x
    x = 840,281.94/883.13
  6. Step 6: Final answer
    x = 951.49

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.