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Finding the Fourth Proportional to 421.60, 632.51 and 248.41

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Solution

The fourth proportional to 421.60, 632.51 and 248.41 is: 372.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.60 : 632.51 = 248.41 : x
  2. Step 2: Convert to fraction form
    421.60/632.51 = 248.41/x
  3. Step 3: Cross multiply
    421.60x = 632.51 × 248.41
  4. Step 4: Simplify right side
    421.60x = 157,121.81
  5. Step 5: Solve for x
    x = 157,121.81/421.60
  6. Step 6: Final answer
    x = 372.68

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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.