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Finding the Fourth Proportional to 339.59, 508.39 and 270.65

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Solution

The fourth proportional to 339.59, 508.39 and 270.65 is: 405.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.59 : 508.39 = 270.65 : x
  2. Step 2: Convert to fraction form
    339.59/508.39 = 270.65/x
  3. Step 3: Cross multiply
    339.59x = 508.39 × 270.65
  4. Step 4: Simplify right side
    339.59x = 137,595.75
  5. Step 5: Solve for x
    x = 137,595.75/339.59
  6. Step 6: Final answer
    x = 405.18

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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.