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Finding the Fourth Proportional to 325.89, 487.92 and 253.89

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Solution

The fourth proportional to 325.89, 487.92 and 253.89 is: 380.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.89 : 487.92 = 253.89 : x
  2. Step 2: Convert to fraction form
    325.89/487.92 = 253.89/x
  3. Step 3: Cross multiply
    325.89x = 487.92 × 253.89
  4. Step 4: Simplify right side
    325.89x = 123,878.01
  5. Step 5: Solve for x
    x = 123,878.01/325.89
  6. Step 6: Final answer
    x = 380.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.