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Finding the Fourth Proportional to 261.42, 360.79 and 150.90

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Solution

The fourth proportional to 261.42, 360.79 and 150.90 is: 208.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.42 : 360.79 = 150.90 : x
  2. Step 2: Convert to fraction form
    261.42/360.79 = 150.90/x
  3. Step 3: Cross multiply
    261.42x = 360.79 × 150.90
  4. Step 4: Simplify right side
    261.42x = 54,443.21
  5. Step 5: Solve for x
    x = 54,443.21/261.42
  6. Step 6: Final answer
    x = 208.26

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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.