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Finding the Fourth Proportional to 489.24, 732.78 and 326.16

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Solution

The fourth proportional to 489.24, 732.78 and 326.16 is: 488.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.24 : 732.78 = 326.16 : x
  2. Step 2: Convert to fraction form
    489.24/732.78 = 326.16/x
  3. Step 3: Cross multiply
    489.24x = 732.78 × 326.16
  4. Step 4: Simplify right side
    489.24x = 239,003.52
  5. Step 5: Solve for x
    x = 239,003.52/489.24
  6. Step 6: Final answer
    x = 488.52

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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.