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Finding the Fourth Proportional to 1,371.75, 1,893.15 and 847.95

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Solution

The fourth proportional to 1,371.75, 1,893.15 and 847.95 is: 1,170.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.75 : 1,893.15 = 847.95 : x
  2. Step 2: Convert to fraction form
    1,371.75/1,893.15 = 847.95/x
  3. Step 3: Cross multiply
    1,371.75x = 1,893.15 × 847.95
  4. Step 4: Simplify right side
    1,371.75x = 1,605,296.54
  5. Step 5: Solve for x
    x = 1,605,296.54/1,371.75
  6. Step 6: Final answer
    x = 1,170.25

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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.