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Finding the Fourth Proportional to 261.15, 360.34 and 150.61

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Solution

The fourth proportional to 261.15, 360.34 and 150.61 is: 207.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.15 : 360.34 = 150.61 : x
  2. Step 2: Convert to fraction form
    261.15/360.34 = 150.61/x
  3. Step 3: Cross multiply
    261.15x = 360.34 × 150.61
  4. Step 4: Simplify right side
    261.15x = 54,270.81
  5. Step 5: Solve for x
    x = 54,270.81/261.15
  6. Step 6: Final answer
    x = 207.81

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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.