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Finding the Fourth Proportional to 339.15, 508.38 and 133.59

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Solution

The fourth proportional to 339.15, 508.38 and 133.59 is: 200.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.15 : 508.38 = 133.59 : x
  2. Step 2: Convert to fraction form
    339.15/508.38 = 133.59/x
  3. Step 3: Cross multiply
    339.15x = 508.38 × 133.59
  4. Step 4: Simplify right side
    339.15x = 67,914.48
  5. Step 5: Solve for x
    x = 67,914.48/339.15
  6. Step 6: Final answer
    x = 200.25

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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.