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Finding the Fourth Proportional to 2,857.67, 4,286.55 and 1,008.74

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Solution

The fourth proportional to 2,857.67, 4,286.55 and 1,008.74 is: 1,513.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.67 : 4,286.55 = 1,008.74 : x
  2. Step 2: Convert to fraction form
    2,857.67/4,286.55 = 1,008.74/x
  3. Step 3: Cross multiply
    2,857.67x = 4,286.55 × 1,008.74
  4. Step 4: Simplify right side
    2,857.67x = 4,323,993.01
  5. Step 5: Solve for x
    x = 4,323,993.01/2,857.67
  6. Step 6: Final answer
    x = 1,513.12

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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.