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Finding the Fourth Proportional to 489.72, 736.26 and 394.20

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Solution

The fourth proportional to 489.72, 736.26 and 394.20 is: 592.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.72 : 736.26 = 394.20 : x
  2. Step 2: Convert to fraction form
    489.72/736.26 = 394.20/x
  3. Step 3: Cross multiply
    489.72x = 736.26 × 394.20
  4. Step 4: Simplify right side
    489.72x = 290,233.69
  5. Step 5: Solve for x
    x = 290,233.69/489.72
  6. Step 6: Final answer
    x = 592.65

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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.