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Finding the Fourth Proportional to 694.11, 958.05 and 445.51

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Solution

The fourth proportional to 694.11, 958.05 and 445.51 is: 614.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.11 : 958.05 = 445.51 : x
  2. Step 2: Convert to fraction form
    694.11/958.05 = 445.51/x
  3. Step 3: Cross multiply
    694.11x = 958.05 × 445.51
  4. Step 4: Simplify right side
    694.11x = 426,813.84
  5. Step 5: Solve for x
    x = 426,813.84/694.11
  6. Step 6: Final answer
    x = 614.91

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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.