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Finding the Fourth Proportional to 262.60, 362.78 and 223.66

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Solution

The fourth proportional to 262.60, 362.78 and 223.66 is: 308.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.60 : 362.78 = 223.66 : x
  2. Step 2: Convert to fraction form
    262.60/362.78 = 223.66/x
  3. Step 3: Cross multiply
    262.60x = 362.78 × 223.66
  4. Step 4: Simplify right side
    262.60x = 81,139.37
  5. Step 5: Solve for x
    x = 81,139.37/262.60
  6. Step 6: Final answer
    x = 308.98

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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.