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Finding the Fourth Proportional to 489.52, 733.11 and 386.56

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Solution

The fourth proportional to 489.52, 733.11 and 386.56 is: 578.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.52 : 733.11 = 386.56 : x
  2. Step 2: Convert to fraction form
    489.52/733.11 = 386.56/x
  3. Step 3: Cross multiply
    489.52x = 733.11 × 386.56
  4. Step 4: Simplify right side
    489.52x = 283,391.00
  5. Step 5: Solve for x
    x = 283,391.00/489.52
  6. Step 6: Final answer
    x = 578.92

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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.