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Finding the Fourth Proportional to 632.71, 948.76 and 221.81

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Solution

The fourth proportional to 632.71, 948.76 and 221.81 is: 332.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.71 : 948.76 = 221.81 : x
  2. Step 2: Convert to fraction form
    632.71/948.76 = 221.81/x
  3. Step 3: Cross multiply
    632.71x = 948.76 × 221.81
  4. Step 4: Simplify right side
    632.71x = 210,440.40
  5. Step 5: Solve for x
    x = 210,440.40/632.71
  6. Step 6: Final answer
    x = 332.60

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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.