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Finding the Fourth Proportional to 1,690.28, 2,535.62 and 716.26

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Solution

The fourth proportional to 1,690.28, 2,535.62 and 716.26 is: 1,074.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.28 : 2,535.62 = 716.26 : x
  2. Step 2: Convert to fraction form
    1,690.28/2,535.62 = 716.26/x
  3. Step 3: Cross multiply
    1,690.28x = 2,535.62 × 716.26
  4. Step 4: Simplify right side
    1,690.28x = 1,816,163.18
  5. Step 5: Solve for x
    x = 1,816,163.18/1,690.28
  6. Step 6: Final answer
    x = 1,074.47

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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.