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Finding the Fourth Proportional to 339.88, 509.22 and 123.32

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Solution

The fourth proportional to 339.88, 509.22 and 123.32 is: 184.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.88 : 509.22 = 123.32 : x
  2. Step 2: Convert to fraction form
    339.88/509.22 = 123.32/x
  3. Step 3: Cross multiply
    339.88x = 509.22 × 123.32
  4. Step 4: Simplify right side
    339.88x = 62,797.01
  5. Step 5: Solve for x
    x = 62,797.01/339.88
  6. Step 6: Final answer
    x = 184.76

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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.