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Finding the Fourth Proportional to 372.51, 513.79 and 225.05

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Solution

The fourth proportional to 372.51, 513.79 and 225.05 is: 310.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.51 : 513.79 = 225.05 : x
  2. Step 2: Convert to fraction form
    372.51/513.79 = 225.05/x
  3. Step 3: Cross multiply
    372.51x = 513.79 × 225.05
  4. Step 4: Simplify right side
    372.51x = 115,625.31
  5. Step 5: Solve for x
    x = 115,625.31/372.51
  6. Step 6: Final answer
    x = 310.40

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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.