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Finding the Fourth Proportional to 3,171, 4,376.20 and 1,754.80

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Solution

The fourth proportional to 3,171, 4,376.20 and 1,754.80 is: 2,421.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171 : 4,376.20 = 1,754.80 : x
  2. Step 2: Convert to fraction form
    3,171/4,376.20 = 1,754.80/x
  3. Step 3: Cross multiply
    3,171x = 4,376.20 × 1,754.80
  4. Step 4: Simplify right side
    3,171x = 7,679,355.76
  5. Step 5: Solve for x
    x = 7,679,355.76/3,171
  6. Step 6: Final answer
    x = 2,421.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.