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Finding the Fourth Proportional to 335.40, 502.56 and 326.40

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Solution

The fourth proportional to 335.40, 502.56 and 326.40 is: 489.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.40 : 502.56 = 326.40 : x
  2. Step 2: Convert to fraction form
    335.40/502.56 = 326.40/x
  3. Step 3: Cross multiply
    335.40x = 502.56 × 326.40
  4. Step 4: Simplify right side
    335.40x = 164,035.58
  5. Step 5: Solve for x
    x = 164,035.58/335.40
  6. Step 6: Final answer
    x = 489.07

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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.