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Finding the Fourth Proportional to 338.96, 510.62 and 254

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Solution

The fourth proportional to 338.96, 510.62 and 254 is: 382.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.96 : 510.62 = 254 : x
  2. Step 2: Convert to fraction form
    338.96/510.62 = 254/x
  3. Step 3: Cross multiply
    338.96x = 510.62 × 254
  4. Step 4: Simplify right side
    338.96x = 129,697.48
  5. Step 5: Solve for x
    x = 129,697.48/338.96
  6. Step 6: Final answer
    x = 382.63

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.