Home / 3,126.25-4,689.42-817.75

Finding the Fourth Proportional to 3,126.25, 4,689.42 and 817.75

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Solution

The fourth proportional to 3,126.25, 4,689.42 and 817.75 is: 1,226.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.25 : 4,689.42 = 817.75 : x
  2. Step 2: Convert to fraction form
    3,126.25/4,689.42 = 817.75/x
  3. Step 3: Cross multiply
    3,126.25x = 4,689.42 × 817.75
  4. Step 4: Simplify right side
    3,126.25x = 3,834,773.21
  5. Step 5: Solve for x
    x = 3,834,773.21/3,126.25
  6. Step 6: Final answer
    x = 1,226.64

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1.5x scale

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.