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Finding the Fourth Proportional to 325.32, 487.08 and 279

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Solution

The fourth proportional to 325.32, 487.08 and 279 is: 417.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.32 : 487.08 = 279 : x
  2. Step 2: Convert to fraction form
    325.32/487.08 = 279/x
  3. Step 3: Cross multiply
    325.32x = 487.08 × 279
  4. Step 4: Simplify right side
    325.32x = 135,895.32
  5. Step 5: Solve for x
    x = 135,895.32/325.32
  6. Step 6: Final answer
    x = 417.73

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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.