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Finding the Fourth Proportional to 1,099.56, 1,649.86 and 551.80

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Solution

The fourth proportional to 1,099.56, 1,649.86 and 551.80 is: 827.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.56 : 1,649.86 = 551.80 : x
  2. Step 2: Convert to fraction form
    1,099.56/1,649.86 = 551.80/x
  3. Step 3: Cross multiply
    1,099.56x = 1,649.86 × 551.80
  4. Step 4: Simplify right side
    1,099.56x = 910,392.75
  5. Step 5: Solve for x
    x = 910,392.75/1,099.56
  6. Step 6: Final answer
    x = 827.96

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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.