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Finding the Fourth Proportional to 844.35, 1,266.62 and 399.66

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Solution

The fourth proportional to 844.35, 1,266.62 and 399.66 is: 599.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.35 : 1,266.62 = 399.66 : x
  2. Step 2: Convert to fraction form
    844.35/1,266.62 = 399.66/x
  3. Step 3: Cross multiply
    844.35x = 1,266.62 × 399.66
  4. Step 4: Simplify right side
    844.35x = 506,215.35
  5. Step 5: Solve for x
    x = 506,215.35/844.35
  6. Step 6: Final answer
    x = 599.53

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.