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Finding the Fourth Proportional to 373.25, 515.47 and 255.76

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Solution

The fourth proportional to 373.25, 515.47 and 255.76 is: 353.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.25 : 515.47 = 255.76 : x
  2. Step 2: Convert to fraction form
    373.25/515.47 = 255.76/x
  3. Step 3: Cross multiply
    373.25x = 515.47 × 255.76
  4. Step 4: Simplify right side
    373.25x = 131,836.61
  5. Step 5: Solve for x
    x = 131,836.61/373.25
  6. Step 6: Final answer
    x = 353.21

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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.