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Finding the Fourth Proportional to 372.18, 513.36 and 261.48

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Solution

The fourth proportional to 372.18, 513.36 and 261.48 is: 360.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.18 : 513.36 = 261.48 : x
  2. Step 2: Convert to fraction form
    372.18/513.36 = 261.48/x
  3. Step 3: Cross multiply
    372.18x = 513.36 × 261.48
  4. Step 4: Simplify right side
    372.18x = 134,233.37
  5. Step 5: Solve for x
    x = 134,233.37/372.18
  6. Step 6: Final answer
    x = 360.67

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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.