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Finding the Fourth Proportional to 632.13, 872.03 and 392.88

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Solution

The fourth proportional to 632.13, 872.03 and 392.88 is: 541.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.13 : 872.03 = 392.88 : x
  2. Step 2: Convert to fraction form
    632.13/872.03 = 392.88/x
  3. Step 3: Cross multiply
    632.13x = 872.03 × 392.88
  4. Step 4: Simplify right side
    632.13x = 342,596.82
  5. Step 5: Solve for x
    x = 342,596.82/632.13
  6. Step 6: Final answer
    x = 541.98

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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.