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Finding the Fourth Proportional to 339.29, 509.13 and 122.85

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Solution

The fourth proportional to 339.29, 509.13 and 122.85 is: 184.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.29 : 509.13 = 122.85 : x
  2. Step 2: Convert to fraction form
    339.29/509.13 = 122.85/x
  3. Step 3: Cross multiply
    339.29x = 509.13 × 122.85
  4. Step 4: Simplify right side
    339.29x = 62,543.46
  5. Step 5: Solve for x
    x = 62,543.46/339.29
  6. Step 6: Final answer
    x = 184.34

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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.