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Finding the Fourth Proportional to 1,712.78, 2,558.86 and 1,091.24

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Solution

The fourth proportional to 1,712.78, 2,558.86 and 1,091.24 is: 1,630.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,712.78 : 2,558.86 = 1,091.24 : x
  2. Step 2: Convert to fraction form
    1,712.78/2,558.86 = 1,091.24/x
  3. Step 3: Cross multiply
    1,712.78x = 2,558.86 × 1,091.24
  4. Step 4: Simplify right side
    1,712.78x = 2,792,330.39
  5. Step 5: Solve for x
    x = 2,792,330.39/1,712.78
  6. Step 6: Final answer
    x = 1,630.29

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.