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Finding the Fourth Proportional to 2,679.62, 4,020.10 and 2,164.30

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Solution

The fourth proportional to 2,679.62, 4,020.10 and 2,164.30 is: 3,246.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.62 : 4,020.10 = 2,164.30 : x
  2. Step 2: Convert to fraction form
    2,679.62/4,020.10 = 2,164.30/x
  3. Step 3: Cross multiply
    2,679.62x = 4,020.10 × 2,164.30
  4. Step 4: Simplify right side
    2,679.62x = 8,700,702.43
  5. Step 5: Solve for x
    x = 8,700,702.43/2,679.62
  6. Step 6: Final answer
    x = 3,246.99

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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.