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Finding the Fourth Proportional to 1,799.11, 2,698.21 and 688.30

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Solution

The fourth proportional to 1,799.11, 2,698.21 and 688.30 is: 1,032.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,799.11 : 2,698.21 = 688.30 : x
  2. Step 2: Convert to fraction form
    1,799.11/2,698.21 = 688.30/x
  3. Step 3: Cross multiply
    1,799.11x = 2,698.21 × 688.30
  4. Step 4: Simplify right side
    1,799.11x = 1,857,172.06
  5. Step 5: Solve for x
    x = 1,857,172.06/1,799.11
  6. Step 6: Final answer
    x = 1,032.27

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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.