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Finding the Fourth Proportional to 261.06, 389.67 and 233.66

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Solution

The fourth proportional to 261.06, 389.67 and 233.66 is: 348.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    261.06 : 389.67 = 233.66 : x
  2. Step 2: Convert to fraction form
    261.06/389.67 = 233.66/x
  3. Step 3: Cross multiply
    261.06x = 389.67 × 233.66
  4. Step 4: Simplify right side
    261.06x = 91,048.34
  5. Step 5: Solve for x
    x = 91,048.34/261.06
  6. Step 6: Final answer
    x = 348.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.