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Finding the Fourth Proportional to 386.82, 534.06 and 268.76

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Solution

The fourth proportional to 386.82, 534.06 and 268.76 is: 371.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.82 : 534.06 = 268.76 : x
  2. Step 2: Convert to fraction form
    386.82/534.06 = 268.76/x
  3. Step 3: Cross multiply
    386.82x = 534.06 × 268.76
  4. Step 4: Simplify right side
    386.82x = 143,532.79
  5. Step 5: Solve for x
    x = 143,532.79/386.82
  6. Step 6: Final answer
    x = 371.06

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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.