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Finding the Fourth Proportional to 1,757.87, 2,630.63 and 1,388.81

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Solution

The fourth proportional to 1,757.87, 2,630.63 and 1,388.81 is: 2,078.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,757.87 : 2,630.63 = 1,388.81 : x
  2. Step 2: Convert to fraction form
    1,757.87/2,630.63 = 1,388.81/x
  3. Step 3: Cross multiply
    1,757.87x = 2,630.63 × 1,388.81
  4. Step 4: Simplify right side
    1,757.87x = 3,653,447.49
  5. Step 5: Solve for x
    x = 3,653,447.49/1,757.87
  6. Step 6: Final answer
    x = 2,078.34

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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.