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Finding the Fourth Proportional to 372.28, 513.52 and 317.34

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Solution

The fourth proportional to 372.28, 513.52 and 317.34 is: 437.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.28 : 513.52 = 317.34 : x
  2. Step 2: Convert to fraction form
    372.28/513.52 = 317.34/x
  3. Step 3: Cross multiply
    372.28x = 513.52 × 317.34
  4. Step 4: Simplify right side
    372.28x = 162,960.44
  5. Step 5: Solve for x
    x = 162,960.44/372.28
  6. Step 6: Final answer
    x = 437.74

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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.