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Finding the Fourth Proportional to 2,660.90, 3,992.01 and 1,017.57

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Solution

The fourth proportional to 2,660.90, 3,992.01 and 1,017.57 is: 1,526.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,660.90 : 3,992.01 = 1,017.57 : x
  2. Step 2: Convert to fraction form
    2,660.90/3,992.01 = 1,017.57/x
  3. Step 3: Cross multiply
    2,660.90x = 3,992.01 × 1,017.57
  4. Step 4: Simplify right side
    2,660.90x = 4,062,149.62
  5. Step 5: Solve for x
    x = 4,062,149.62/2,660.90
  6. Step 6: Final answer
    x = 1,526.61

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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.