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Finding the Fourth Proportional to 261.22, 360.41 and 162.90

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Solution

The fourth proportional to 261.22, 360.41 and 162.90 is: 224.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.22 : 360.41 = 162.90 : x
  2. Step 2: Convert to fraction form
    261.22/360.41 = 162.90/x
  3. Step 3: Cross multiply
    261.22x = 360.41 × 162.90
  4. Step 4: Simplify right side
    261.22x = 58,710.79
  5. Step 5: Solve for x
    x = 58,710.79/261.22
  6. Step 6: Final answer
    x = 224.76

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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.