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Finding the Fourth Proportional to 342.07, 513.22 and 122.72

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Solution

The fourth proportional to 342.07, 513.22 and 122.72 is: 184.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.07 : 513.22 = 122.72 : x
  2. Step 2: Convert to fraction form
    342.07/513.22 = 122.72/x
  3. Step 3: Cross multiply
    342.07x = 513.22 × 122.72
  4. Step 4: Simplify right side
    342.07x = 62,979.72
  5. Step 5: Solve for x
    x = 62,979.72/342.07
  6. Step 6: Final answer
    x = 184.11

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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.