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Finding the Fourth Proportional to 339.75, 508.07 and 253.14

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Solution

The fourth proportional to 339.75, 508.07 and 253.14 is: 378.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.75 : 508.07 = 253.14 : x
  2. Step 2: Convert to fraction form
    339.75/508.07 = 253.14/x
  3. Step 3: Cross multiply
    339.75x = 508.07 × 253.14
  4. Step 4: Simplify right side
    339.75x = 128,613.48
  5. Step 5: Solve for x
    x = 128,613.48/339.75
  6. Step 6: Final answer
    x = 378.55

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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.