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Finding the Fourth Proportional to 339.67, 509.10 and 123.13

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Solution

The fourth proportional to 339.67, 509.10 and 123.13 is: 184.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.67 : 509.10 = 123.13 : x
  2. Step 2: Convert to fraction form
    339.67/509.10 = 123.13/x
  3. Step 3: Cross multiply
    339.67x = 509.10 × 123.13
  4. Step 4: Simplify right side
    339.67x = 62,685.48
  5. Step 5: Solve for x
    x = 62,685.48/339.67
  6. Step 6: Final answer
    x = 184.55

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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.