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Finding the Fourth Proportional to 325.91, 486.89 and 248.66

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Solution

The fourth proportional to 325.91, 486.89 and 248.66 is: 371.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.91 : 486.89 = 248.66 : x
  2. Step 2: Convert to fraction form
    325.91/486.89 = 248.66/x
  3. Step 3: Cross multiply
    325.91x = 486.89 × 248.66
  4. Step 4: Simplify right side
    325.91x = 121,070.07
  5. Step 5: Solve for x
    x = 121,070.07/325.91
  6. Step 6: Final answer
    x = 371.48

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.