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Finding the Fourth Proportional to 908.20, 1,253.18 and 576.60

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Solution

The fourth proportional to 908.20, 1,253.18 and 576.60 is: 795.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.20 : 1,253.18 = 576.60 : x
  2. Step 2: Convert to fraction form
    908.20/1,253.18 = 576.60/x
  3. Step 3: Cross multiply
    908.20x = 1,253.18 × 576.60
  4. Step 4: Simplify right side
    908.20x = 722,583.59
  5. Step 5: Solve for x
    x = 722,583.59/908.20
  6. Step 6: Final answer
    x = 795.62

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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.