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Finding the Fourth Proportional to 1,076.88, 1,625.74 and 1,071.12

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Solution

The fourth proportional to 1,076.88, 1,625.74 and 1,071.12 is: 1,617.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.88 : 1,625.74 = 1,071.12 : x
  2. Step 2: Convert to fraction form
    1,076.88/1,625.74 = 1,071.12/x
  3. Step 3: Cross multiply
    1,076.88x = 1,625.74 × 1,071.12
  4. Step 4: Simplify right side
    1,076.88x = 1,741,362.63
  5. Step 5: Solve for x
    x = 1,741,362.63/1,076.88
  6. Step 6: Final answer
    x = 1,617.04

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Why These Related Problems?

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