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Finding the Fourth Proportional to 452.79, 625.12 and 287.25

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Solution

The fourth proportional to 452.79, 625.12 and 287.25 is: 396.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.79 : 625.12 = 287.25 : x
  2. Step 2: Convert to fraction form
    452.79/625.12 = 287.25/x
  3. Step 3: Cross multiply
    452.79x = 625.12 × 287.25
  4. Step 4: Simplify right side
    452.79x = 179,562.66
  5. Step 5: Solve for x
    x = 179,562.66/452.79
  6. Step 6: Final answer
    x = 396.57

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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.