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Finding the Fourth Proportional to 1,763.68, 2,640.48 and 1,399

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Solution

The fourth proportional to 1,763.68, 2,640.48 and 1,399 is: 2,094.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,763.68 : 2,640.48 = 1,399 : x
  2. Step 2: Convert to fraction form
    1,763.68/2,640.48 = 1,399/x
  3. Step 3: Cross multiply
    1,763.68x = 2,640.48 × 1,399
  4. Step 4: Simplify right side
    1,763.68x = 3,694,031.52
  5. Step 5: Solve for x
    x = 3,694,031.52/1,763.68
  6. Step 6: Final answer
    x = 2,094.50

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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.