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Finding the Fourth Proportional to 632.40, 872.28 and 446.28

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Solution

The fourth proportional to 632.40, 872.28 and 446.28 is: 615.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.40 : 872.28 = 446.28 : x
  2. Step 2: Convert to fraction form
    632.40/872.28 = 446.28/x
  3. Step 3: Cross multiply
    632.40x = 872.28 × 446.28
  4. Step 4: Simplify right side
    632.40x = 389,281.12
  5. Step 5: Solve for x
    x = 389,281.12/632.40
  6. Step 6: Final answer
    x = 615.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.