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Finding the Fourth Proportional to 632.97, 872.51 and 399.69

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Solution

The fourth proportional to 632.97, 872.51 and 399.69 is: 550.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.97 : 872.51 = 399.69 : x
  2. Step 2: Convert to fraction form
    632.97/872.51 = 399.69/x
  3. Step 3: Cross multiply
    632.97x = 872.51 × 399.69
  4. Step 4: Simplify right side
    632.97x = 348,731.52
  5. Step 5: Solve for x
    x = 348,731.52/632.97
  6. Step 6: Final answer
    x = 550.94

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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.