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Finding the Fourth Proportional to 632.39, 872.80 and 383.92

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Solution

The fourth proportional to 632.39, 872.80 and 383.92 is: 529.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.39 : 872.80 = 383.92 : x
  2. Step 2: Convert to fraction form
    632.39/872.80 = 383.92/x
  3. Step 3: Cross multiply
    632.39x = 872.80 × 383.92
  4. Step 4: Simplify right side
    632.39x = 335,081.01
  5. Step 5: Solve for x
    x = 335,081.01/632.39
  6. Step 6: Final answer
    x = 529.87

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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.