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Finding the Fourth Proportional to 632.30, 948.62 and 285.74

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Solution

The fourth proportional to 632.30, 948.62 and 285.74 is: 428.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.30 : 948.62 = 285.74 : x
  2. Step 2: Convert to fraction form
    632.30/948.62 = 285.74/x
  3. Step 3: Cross multiply
    632.30x = 948.62 × 285.74
  4. Step 4: Simplify right side
    632.30x = 271,058.68
  5. Step 5: Solve for x
    x = 271,058.68/632.30
  6. Step 6: Final answer
    x = 428.69

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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.