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Finding the Fourth Proportional to 255.68, 353.13 and 168.74

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Solution

The fourth proportional to 255.68, 353.13 and 168.74 is: 233.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.68 : 353.13 = 168.74 : x
  2. Step 2: Convert to fraction form
    255.68/353.13 = 168.74/x
  3. Step 3: Cross multiply
    255.68x = 353.13 × 168.74
  4. Step 4: Simplify right side
    255.68x = 59,587.16
  5. Step 5: Solve for x
    x = 59,587.16/255.68
  6. Step 6: Final answer
    x = 233.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.