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Finding the Fourth Proportional to 636.84, 878.49 and 437.69

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Solution

The fourth proportional to 636.84, 878.49 and 437.69 is: 603.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.84 : 878.49 = 437.69 : x
  2. Step 2: Convert to fraction form
    636.84/878.49 = 437.69/x
  3. Step 3: Cross multiply
    636.84x = 878.49 × 437.69
  4. Step 4: Simplify right side
    636.84x = 384,501.90
  5. Step 5: Solve for x
    x = 384,501.90/636.84
  6. Step 6: Final answer
    x = 603.77

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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.