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Finding the Fourth Proportional to 1,100.28, 1,649.40 and 551.88

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Solution

The fourth proportional to 1,100.28, 1,649.40 and 551.88 is: 827.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.28 : 1,649.40 = 551.88 : x
  2. Step 2: Convert to fraction form
    1,100.28/1,649.40 = 551.88/x
  3. Step 3: Cross multiply
    1,100.28x = 1,649.40 × 551.88
  4. Step 4: Simplify right side
    1,100.28x = 910,270.87
  5. Step 5: Solve for x
    x = 910,270.87/1,100.28
  6. Step 6: Final answer
    x = 827.31

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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.