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Finding the Fourth Proportional to 489.78, 734.27 and 335.32

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Solution

The fourth proportional to 489.78, 734.27 and 335.32 is: 502.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.78 : 734.27 = 335.32 : x
  2. Step 2: Convert to fraction form
    489.78/734.27 = 335.32/x
  3. Step 3: Cross multiply
    489.78x = 734.27 × 335.32
  4. Step 4: Simplify right side
    489.78x = 246,216.03
  5. Step 5: Solve for x
    x = 246,216.03/489.78
  6. Step 6: Final answer
    x = 502.71

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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.