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Finding the Fourth Proportional to 636.84, 878.81 and 374.85

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Solution

The fourth proportional to 636.84, 878.81 and 374.85 is: 517.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.84 : 878.81 = 374.85 : x
  2. Step 2: Convert to fraction form
    636.84/878.81 = 374.85/x
  3. Step 3: Cross multiply
    636.84x = 878.81 × 374.85
  4. Step 4: Simplify right side
    636.84x = 329,420.05
  5. Step 5: Solve for x
    x = 329,420.05/636.84
  6. Step 6: Final answer
    x = 517.27

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1.5x scale

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.