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Finding the Fourth Proportional to 618.97, 854.27 and 386.17

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Solution

The fourth proportional to 618.97, 854.27 and 386.17 is: 532.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.97 : 854.27 = 386.17 : x
  2. Step 2: Convert to fraction form
    618.97/854.27 = 386.17/x
  3. Step 3: Cross multiply
    618.97x = 854.27 × 386.17
  4. Step 4: Simplify right side
    618.97x = 329,891.52
  5. Step 5: Solve for x
    x = 329,891.52/618.97
  6. Step 6: Final answer
    x = 532.97

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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.