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Finding the Fourth Proportional to 325.52, 487.92 and 143

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Solution

The fourth proportional to 325.52, 487.92 and 143 is: 214.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.52 : 487.92 = 143 : x
  2. Step 2: Convert to fraction form
    325.52/487.92 = 143/x
  3. Step 3: Cross multiply
    325.52x = 487.92 × 143
  4. Step 4: Simplify right side
    325.52x = 69,772.56
  5. Step 5: Solve for x
    x = 69,772.56/325.52
  6. Step 6: Final answer
    x = 214.34

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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.