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Finding the Fourth Proportional to 325.39, 487.28 and 298.08

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Solution

The fourth proportional to 325.39, 487.28 and 298.08 is: 446.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.39 : 487.28 = 298.08 : x
  2. Step 2: Convert to fraction form
    325.39/487.28 = 298.08/x
  3. Step 3: Cross multiply
    325.39x = 487.28 × 298.08
  4. Step 4: Simplify right side
    325.39x = 145,248.42
  5. Step 5: Solve for x
    x = 145,248.42/325.39
  6. Step 6: Final answer
    x = 446.38

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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.