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Finding the Fourth Proportional to 1,690.79, 2,530.01 and 997.79

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Solution

The fourth proportional to 1,690.79, 2,530.01 and 997.79 is: 1,493.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.79 : 2,530.01 = 997.79 : x
  2. Step 2: Convert to fraction form
    1,690.79/2,530.01 = 997.79/x
  3. Step 3: Cross multiply
    1,690.79x = 2,530.01 × 997.79
  4. Step 4: Simplify right side
    1,690.79x = 2,524,406.03
  5. Step 5: Solve for x
    x = 2,524,406.03/1,690.79
  6. Step 6: Final answer
    x = 1,493.04

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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.