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Finding the Fourth Proportional to 634.95, 876.26 and 355.18

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Solution

The fourth proportional to 634.95, 876.26 and 355.18 is: 490.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    634.95 : 876.26 = 355.18 : x
  2. Step 2: Convert to fraction form
    634.95/876.26 = 355.18/x
  3. Step 3: Cross multiply
    634.95x = 876.26 × 355.18
  4. Step 4: Simplify right side
    634.95x = 311,230.68
  5. Step 5: Solve for x
    x = 311,230.68/634.95
  6. Step 6: Final answer
    x = 490.17

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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.