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Finding the Fourth Proportional to 2,661.60, 3,994.20 and 1,734.90

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Solution

The fourth proportional to 2,661.60, 3,994.20 and 1,734.90 is: 2,603.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661.60 : 3,994.20 = 1,734.90 : x
  2. Step 2: Convert to fraction form
    2,661.60/3,994.20 = 1,734.90/x
  3. Step 3: Cross multiply
    2,661.60x = 3,994.20 × 1,734.90
  4. Step 4: Simplify right side
    2,661.60x = 6,929,537.58
  5. Step 5: Solve for x
    x = 6,929,537.58/2,661.60
  6. Step 6: Final answer
    x = 2,603.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.