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Finding the Fourth Proportional to 1,712.94, 2,559 and 1,091.70

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Solution

The fourth proportional to 1,712.94, 2,559 and 1,091.70 is: 1,630.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,712.94 : 2,559 = 1,091.70 : x
  2. Step 2: Convert to fraction form
    1,712.94/2,559 = 1,091.70/x
  3. Step 3: Cross multiply
    1,712.94x = 2,559 × 1,091.70
  4. Step 4: Simplify right side
    1,712.94x = 2,793,660.30
  5. Step 5: Solve for x
    x = 2,793,660.30/1,712.94
  6. Step 6: Final answer
    x = 1,630.92

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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.