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Finding the Fourth Proportional to 2,758.60, 4,127.10 and 1,786.60

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Solution

The fourth proportional to 2,758.60, 4,127.10 and 1,786.60 is: 2,672.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,758.60 : 4,127.10 = 1,786.60 : x
  2. Step 2: Convert to fraction form
    2,758.60/4,127.10 = 1,786.60/x
  3. Step 3: Cross multiply
    2,758.60x = 4,127.10 × 1,786.60
  4. Step 4: Simplify right side
    2,758.60x = 7,373,476.86
  5. Step 5: Solve for x
    x = 7,373,476.86/2,758.60
  6. Step 6: Final answer
    x = 2,672.91

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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.