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Finding the Fourth Proportional to 261.79, 394.52 and 235.79

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Solution

The fourth proportional to 261.79, 394.52 and 235.79 is: 355.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.79 : 394.52 = 235.79 : x
  2. Step 2: Convert to fraction form
    261.79/394.52 = 235.79/x
  3. Step 3: Cross multiply
    261.79x = 394.52 × 235.79
  4. Step 4: Simplify right side
    261.79x = 93,024.31
  5. Step 5: Solve for x
    x = 93,024.31/261.79
  6. Step 6: Final answer
    x = 355.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.