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Finding the Fourth Proportional to 261.25, 360.52 and 143.22

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Solution

The fourth proportional to 261.25, 360.52 and 143.22 is: 197.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.25 : 360.52 = 143.22 : x
  2. Step 2: Convert to fraction form
    261.25/360.52 = 143.22/x
  3. Step 3: Cross multiply
    261.25x = 360.52 × 143.22
  4. Step 4: Simplify right side
    261.25x = 51,633.32
  5. Step 5: Solve for x
    x = 51,633.32/261.25
  6. Step 6: Final answer
    x = 197.64

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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.