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Finding the Fourth Proportional to 1,050.28, 1,449.99 and 677.80

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Solution

The fourth proportional to 1,050.28, 1,449.99 and 677.80 is: 935.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,050.28 : 1,449.99 = 677.80 : x
  2. Step 2: Convert to fraction form
    1,050.28/1,449.99 = 677.80/x
  3. Step 3: Cross multiply
    1,050.28x = 1,449.99 × 677.80
  4. Step 4: Simplify right side
    1,050.28x = 982,805.03
  5. Step 5: Solve for x
    x = 982,805.03/1,050.28
  6. Step 6: Final answer
    x = 935.76

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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.