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Finding the Fourth Proportional to 372.60, 513.54 and 261.72

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Solution

The fourth proportional to 372.60, 513.54 and 261.72 is: 360.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.60 : 513.54 = 261.72 : x
  2. Step 2: Convert to fraction form
    372.60/513.54 = 261.72/x
  3. Step 3: Cross multiply
    372.60x = 513.54 × 261.72
  4. Step 4: Simplify right side
    372.60x = 134,403.69
  5. Step 5: Solve for x
    x = 134,403.69/372.60
  6. Step 6: Final answer
    x = 360.72

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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.