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Finding the Fourth Proportional to 325.31, 448.80 and 185.40

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Solution

The fourth proportional to 325.31, 448.80 and 185.40 is: 255.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.31 : 448.80 = 185.40 : x
  2. Step 2: Convert to fraction form
    325.31/448.80 = 185.40/x
  3. Step 3: Cross multiply
    325.31x = 448.80 × 185.40
  4. Step 4: Simplify right side
    325.31x = 83,209.90
  5. Step 5: Solve for x
    x = 83,209.90/325.31
  6. Step 6: Final answer
    x = 255.78

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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.