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Finding the Fourth Proportional to 632.74, 948.13 and 426.58

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Solution

The fourth proportional to 632.74, 948.13 and 426.58 is: 639.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.74 : 948.13 = 426.58 : x
  2. Step 2: Convert to fraction form
    632.74/948.13 = 426.58/x
  3. Step 3: Cross multiply
    632.74x = 948.13 × 426.58
  4. Step 4: Simplify right side
    632.74x = 404,453.30
  5. Step 5: Solve for x
    x = 404,453.30/632.74
  6. Step 6: Final answer
    x = 639.21

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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.