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Finding the Fourth Proportional to 948.62, 1,422.17 and 636.60

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Solution

The fourth proportional to 948.62, 1,422.17 and 636.60 is: 954.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.62 : 1,422.17 = 636.60 : x
  2. Step 2: Convert to fraction form
    948.62/1,422.17 = 636.60/x
  3. Step 3: Cross multiply
    948.62x = 1,422.17 × 636.60
  4. Step 4: Simplify right side
    948.62x = 905,346.31
  5. Step 5: Solve for x
    x = 905,346.31/948.62
  6. Step 6: Final answer
    x = 954.38

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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.