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Finding the Fourth Proportional to 261.43, 360.81 and 150.91

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Solution

The fourth proportional to 261.43, 360.81 and 150.91 is: 208.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.43 : 360.81 = 150.91 : x
  2. Step 2: Convert to fraction form
    261.43/360.81 = 150.91/x
  3. Step 3: Cross multiply
    261.43x = 360.81 × 150.91
  4. Step 4: Simplify right side
    261.43x = 54,448.03
  5. Step 5: Solve for x
    x = 54,448.03/261.43
  6. Step 6: Final answer
    x = 208.27

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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.