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Finding the Fourth Proportional to 793.38, 1,091.88 and 635.42

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Solution

The fourth proportional to 793.38, 1,091.88 and 635.42 is: 874.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    793.38 : 1,091.88 = 635.42 : x
  2. Step 2: Convert to fraction form
    793.38/1,091.88 = 635.42/x
  3. Step 3: Cross multiply
    793.38x = 1,091.88 × 635.42
  4. Step 4: Simplify right side
    793.38x = 693,802.39
  5. Step 5: Solve for x
    x = 693,802.39/793.38
  6. Step 6: Final answer
    x = 874.49

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.