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Finding the Fourth Proportional to 666.11, 994.16 and 622.37

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Solution

The fourth proportional to 666.11, 994.16 and 622.37 is: 928.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.11 : 994.16 = 622.37 : x
  2. Step 2: Convert to fraction form
    666.11/994.16 = 622.37/x
  3. Step 3: Cross multiply
    666.11x = 994.16 × 622.37
  4. Step 4: Simplify right side
    666.11x = 618,727.28
  5. Step 5: Solve for x
    x = 618,727.28/666.11
  6. Step 6: Final answer
    x = 928.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.