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Finding the Fourth Proportional to 261.81, 392.25 and 233.56

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Solution

The fourth proportional to 261.81, 392.25 and 233.56 is: 349.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.81 : 392.25 = 233.56 : x
  2. Step 2: Convert to fraction form
    261.81/392.25 = 233.56/x
  3. Step 3: Cross multiply
    261.81x = 392.25 × 233.56
  4. Step 4: Simplify right side
    261.81x = 91,613.91
  5. Step 5: Solve for x
    x = 91,613.91/261.81
  6. Step 6: Final answer
    x = 349.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.