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Finding the Fourth Proportional to 563.20, 844.80 and 408.40

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Solution

The fourth proportional to 563.20, 844.80 and 408.40 is: 612.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    563.20 : 844.80 = 408.40 : x
  2. Step 2: Convert to fraction form
    563.20/844.80 = 408.40/x
  3. Step 3: Cross multiply
    563.20x = 844.80 × 408.40
  4. Step 4: Simplify right side
    563.20x = 345,016.32
  5. Step 5: Solve for x
    x = 345,016.32/563.20
  6. Step 6: Final answer
    x = 612.60

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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.