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Finding the Fourth Proportional to 427.38, 589.68 and 287.25

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Solution

The fourth proportional to 427.38, 589.68 and 287.25 is: 396.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.38 : 589.68 = 287.25 : x
  2. Step 2: Convert to fraction form
    427.38/589.68 = 287.25/x
  3. Step 3: Cross multiply
    427.38x = 589.68 × 287.25
  4. Step 4: Simplify right side
    427.38x = 169,385.58
  5. Step 5: Solve for x
    x = 169,385.58/427.38
  6. Step 6: Final answer
    x = 396.33

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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.