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Finding the Fourth Proportional to 611.66, 844.52 and 399.34

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Solution

The fourth proportional to 611.66, 844.52 and 399.34 is: 551.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.66 : 844.52 = 399.34 : x
  2. Step 2: Convert to fraction form
    611.66/844.52 = 399.34/x
  3. Step 3: Cross multiply
    611.66x = 844.52 × 399.34
  4. Step 4: Simplify right side
    611.66x = 337,246.39
  5. Step 5: Solve for x
    x = 337,246.39/611.66
  6. Step 6: Final answer
    x = 551.36

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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.