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Finding the Fourth Proportional to 489.28, 675.03 and 292.72

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Solution

The fourth proportional to 489.28, 675.03 and 292.72 is: 403.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.28 : 675.03 = 292.72 : x
  2. Step 2: Convert to fraction form
    489.28/675.03 = 292.72/x
  3. Step 3: Cross multiply
    489.28x = 675.03 × 292.72
  4. Step 4: Simplify right side
    489.28x = 197,594.78
  5. Step 5: Solve for x
    x = 197,594.78/489.28
  6. Step 6: Final answer
    x = 403.85

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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.