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Finding the Fourth Proportional to 457.29, 685.53 and 335.39

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Solution

The fourth proportional to 457.29, 685.53 and 335.39 is: 502.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.29 : 685.53 = 335.39 : x
  2. Step 2: Convert to fraction form
    457.29/685.53 = 335.39/x
  3. Step 3: Cross multiply
    457.29x = 685.53 × 335.39
  4. Step 4: Simplify right side
    457.29x = 229,916.48
  5. Step 5: Solve for x
    x = 229,916.48/457.29
  6. Step 6: Final answer
    x = 502.78

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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.