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Finding the Fourth Proportional to 1,797.96, 2,697.30 and 643.56

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Solution

The fourth proportional to 1,797.96, 2,697.30 and 643.56 is: 965.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,797.96 : 2,697.30 = 643.56 : x
  2. Step 2: Convert to fraction form
    1,797.96/2,697.30 = 643.56/x
  3. Step 3: Cross multiply
    1,797.96x = 2,697.30 × 643.56
  4. Step 4: Simplify right side
    1,797.96x = 1,735,874.39
  5. Step 5: Solve for x
    x = 1,735,874.39/1,797.96
  6. Step 6: Final answer
    x = 965.47

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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.