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Finding the Fourth Proportional to 2,420.87, 3,631.30 and 1,691.87

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Solution

The fourth proportional to 2,420.87, 3,631.30 and 1,691.87 is: 2,537.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,420.87 : 3,631.30 = 1,691.87 : x
  2. Step 2: Convert to fraction form
    2,420.87/3,631.30 = 1,691.87/x
  3. Step 3: Cross multiply
    2,420.87x = 3,631.30 × 1,691.87
  4. Step 4: Simplify right side
    2,420.87x = 6,143,665.14
  5. Step 5: Solve for x
    x = 6,143,665.14/2,420.87
  6. Step 6: Final answer
    x = 2,537.80

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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.