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Finding the Fourth Proportional to 1,100.99, 1,519.56 and 628.97

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Solution

The fourth proportional to 1,100.99, 1,519.56 and 628.97 is: 868.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.99 : 1,519.56 = 628.97 : x
  2. Step 2: Convert to fraction form
    1,100.99/1,519.56 = 628.97/x
  3. Step 3: Cross multiply
    1,100.99x = 1,519.56 × 628.97
  4. Step 4: Simplify right side
    1,100.99x = 955,750.06
  5. Step 5: Solve for x
    x = 955,750.06/1,100.99
  6. Step 6: Final answer
    x = 868.08

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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.