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Finding the Fourth Proportional to 339.17, 508.79 and 133.79

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Solution

The fourth proportional to 339.17, 508.79 and 133.79 is: 200.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.17 : 508.79 = 133.79 : x
  2. Step 2: Convert to fraction form
    339.17/508.79 = 133.79/x
  3. Step 3: Cross multiply
    339.17x = 508.79 × 133.79
  4. Step 4: Simplify right side
    339.17x = 68,071.01
  5. Step 5: Solve for x
    x = 68,071.01/339.17
  6. Step 6: Final answer
    x = 200.70

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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.