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Finding the Fourth Proportional to 339.54, 508.77 and 211.02

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Solution

The fourth proportional to 339.54, 508.77 and 211.02 is: 316.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.54 : 508.77 = 211.02 : x
  2. Step 2: Convert to fraction form
    339.54/508.77 = 211.02/x
  3. Step 3: Cross multiply
    339.54x = 508.77 × 211.02
  4. Step 4: Simplify right side
    339.54x = 107,360.65
  5. Step 5: Solve for x
    x = 107,360.65/339.54
  6. Step 6: Final answer
    x = 316.19

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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.