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Finding the Fourth Proportional to 1,033.82, 1,557.72 and 855.21

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Solution

The fourth proportional to 1,033.82, 1,557.72 and 855.21 is: 1,288.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,033.82 : 1,557.72 = 855.21 : x
  2. Step 2: Convert to fraction form
    1,033.82/1,557.72 = 855.21/x
  3. Step 3: Cross multiply
    1,033.82x = 1,557.72 × 855.21
  4. Step 4: Simplify right side
    1,033.82x = 1,332,177.72
  5. Step 5: Solve for x
    x = 1,332,177.72/1,033.82
  6. Step 6: Final answer
    x = 1,288.60

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These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.