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Finding the Fourth Proportional to 948.52, 1,422.92 and 486.55

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Solution

The fourth proportional to 948.52, 1,422.92 and 486.55 is: 729.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.52 : 1,422.92 = 486.55 : x
  2. Step 2: Convert to fraction form
    948.52/1,422.92 = 486.55/x
  3. Step 3: Cross multiply
    948.52x = 1,422.92 × 486.55
  4. Step 4: Simplify right side
    948.52x = 692,321.73
  5. Step 5: Solve for x
    x = 692,321.73/948.52
  6. Step 6: Final answer
    x = 729.90

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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.