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Finding the Fourth Proportional to 339.48, 508.68 and 217.35

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Solution

The fourth proportional to 339.48, 508.68 and 217.35 is: 325.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.48 : 508.68 = 217.35 : x
  2. Step 2: Convert to fraction form
    339.48/508.68 = 217.35/x
  3. Step 3: Cross multiply
    339.48x = 508.68 × 217.35
  4. Step 4: Simplify right side
    339.48x = 110,561.60
  5. Step 5: Solve for x
    x = 110,561.60/339.48
  6. Step 6: Final answer
    x = 325.68

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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.