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Finding the Fourth Proportional to 261.31, 358.61 and 236.69

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Solution

The fourth proportional to 261.31, 358.61 and 236.69 is: 324.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.31 : 358.61 = 236.69 : x
  2. Step 2: Convert to fraction form
    261.31/358.61 = 236.69/x
  3. Step 3: Cross multiply
    261.31x = 358.61 × 236.69
  4. Step 4: Simplify right side
    261.31x = 84,879.40
  5. Step 5: Solve for x
    x = 84,879.40/261.31
  6. Step 6: Final answer
    x = 324.83

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.