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Finding the Fourth Proportional to 261.57, 360.94 and 143.54

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Solution

The fourth proportional to 261.57, 360.94 and 143.54 is: 198.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.57 : 360.94 = 143.54 : x
  2. Step 2: Convert to fraction form
    261.57/360.94 = 143.54/x
  3. Step 3: Cross multiply
    261.57x = 360.94 × 143.54
  4. Step 4: Simplify right side
    261.57x = 51,808.43
  5. Step 5: Solve for x
    x = 51,808.43/261.57
  6. Step 6: Final answer
    x = 198.07

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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.