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Finding the Fourth Proportional to 850.17, 1,275.38 and 265.22

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Solution

The fourth proportional to 850.17, 1,275.38 and 265.22 is: 397.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.17 : 1,275.38 = 265.22 : x
  2. Step 2: Convert to fraction form
    850.17/1,275.38 = 265.22/x
  3. Step 3: Cross multiply
    850.17x = 1,275.38 × 265.22
  4. Step 4: Simplify right side
    850.17x = 338,248.58
  5. Step 5: Solve for x
    x = 338,248.58/850.17
  6. Step 6: Final answer
    x = 397.86

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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.