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Finding the Fourth Proportional to 372.40, 513.84 and 225.08

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Solution

The fourth proportional to 372.40, 513.84 and 225.08 is: 310.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.40 : 513.84 = 225.08 : x
  2. Step 2: Convert to fraction form
    372.40/513.84 = 225.08/x
  3. Step 3: Cross multiply
    372.40x = 513.84 × 225.08
  4. Step 4: Simplify right side
    372.40x = 115,655.11
  5. Step 5: Solve for x
    x = 115,655.11/372.40
  6. Step 6: Final answer
    x = 310.57

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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.