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Finding the Fourth Proportional to 372.12, 513.23 and 306.51

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Solution

The fourth proportional to 372.12, 513.23 and 306.51 is: 422.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.12 : 513.23 = 306.51 : x
  2. Step 2: Convert to fraction form
    372.12/513.23 = 306.51/x
  3. Step 3: Cross multiply
    372.12x = 513.23 × 306.51
  4. Step 4: Simplify right side
    372.12x = 157,308.59
  5. Step 5: Solve for x
    x = 157,308.59/372.12
  6. Step 6: Final answer
    x = 422.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.