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Finding the Fourth Proportional to 339.70, 508.85 and 262.39

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Solution

The fourth proportional to 339.70, 508.85 and 262.39 is: 393.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.70 : 508.85 = 262.39 : x
  2. Step 2: Convert to fraction form
    339.70/508.85 = 262.39/x
  3. Step 3: Cross multiply
    339.70x = 508.85 × 262.39
  4. Step 4: Simplify right side
    339.70x = 133,513.30
  5. Step 5: Solve for x
    x = 133,513.30/339.70
  6. Step 6: Final answer
    x = 393.04

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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.