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Finding the Fourth Proportional to 372.58, 513.30 and 261.85

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Solution

The fourth proportional to 372.58, 513.30 and 261.85 is: 360.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.58 : 513.30 = 261.85 : x
  2. Step 2: Convert to fraction form
    372.58/513.30 = 261.85/x
  3. Step 3: Cross multiply
    372.58x = 513.30 × 261.85
  4. Step 4: Simplify right side
    372.58x = 134,407.61
  5. Step 5: Solve for x
    x = 134,407.61/372.58
  6. Step 6: Final answer
    x = 360.75

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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.