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Finding the Fourth Proportional to 850.67, 1,275.96 and 388.14

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Solution

The fourth proportional to 850.67, 1,275.96 and 388.14 is: 582.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.67 : 1,275.96 = 388.14 : x
  2. Step 2: Convert to fraction form
    850.67/1,275.96 = 388.14/x
  3. Step 3: Cross multiply
    850.67x = 1,275.96 × 388.14
  4. Step 4: Simplify right side
    850.67x = 495,244.87
  5. Step 5: Solve for x
    x = 495,244.87/850.67
  6. Step 6: Final answer
    x = 582.18

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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.