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Finding the Fourth Proportional to 489.92, 675.76 and 373.28

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Solution

The fourth proportional to 489.92, 675.76 and 373.28 is: 514.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.92 : 675.76 = 373.28 : x
  2. Step 2: Convert to fraction form
    489.92/675.76 = 373.28/x
  3. Step 3: Cross multiply
    489.92x = 675.76 × 373.28
  4. Step 4: Simplify right side
    489.92x = 252,247.69
  5. Step 5: Solve for x
    x = 252,247.69/489.92
  6. Step 6: Final answer
    x = 514.88

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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.