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Finding the Fourth Proportional to 634.82, 876.11 and 386.10

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Solution

The fourth proportional to 634.82, 876.11 and 386.10 is: 532.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.82 : 876.11 = 386.10 : x
  2. Step 2: Convert to fraction form
    634.82/876.11 = 386.10/x
  3. Step 3: Cross multiply
    634.82x = 876.11 × 386.10
  4. Step 4: Simplify right side
    634.82x = 338,264.14
  5. Step 5: Solve for x
    x = 338,264.14/634.82
  6. Step 6: Final answer
    x = 532.85

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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.