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Finding the Fourth Proportional to 2,065.88, 3,098 and 766.64

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Solution

The fourth proportional to 2,065.88, 3,098 and 766.64 is: 1,149.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,065.88 : 3,098 = 766.64 : x
  2. Step 2: Convert to fraction form
    2,065.88/3,098 = 766.64/x
  3. Step 3: Cross multiply
    2,065.88x = 3,098 × 766.64
  4. Step 4: Simplify right side
    2,065.88x = 2,375,050.72
  5. Step 5: Solve for x
    x = 2,375,050.72/2,065.88
  6. Step 6: Final answer
    x = 1,149.66

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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.