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Finding the Fourth Proportional to 261.36, 360.71 and 149.32

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Solution

The fourth proportional to 261.36, 360.71 and 149.32 is: 206.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.36 : 360.71 = 149.32 : x
  2. Step 2: Convert to fraction form
    261.36/360.71 = 149.32/x
  3. Step 3: Cross multiply
    261.36x = 360.71 × 149.32
  4. Step 4: Simplify right side
    261.36x = 53,861.75
  5. Step 5: Solve for x
    x = 53,861.75/261.36
  6. Step 6: Final answer
    x = 206.09

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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.