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Finding the Fourth Proportional to 2,680.40, 3,631.50 and 2,680.40

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Solution

The fourth proportional to 2,680.40, 3,631.50 and 2,680.40 is: 3,631.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,680.40 : 3,631.50 = 2,680.40 : x
  2. Step 2: Convert to fraction form
    2,680.40/3,631.50 = 2,680.40/x
  3. Step 3: Cross multiply
    2,680.40x = 3,631.50 × 2,680.40
  4. Step 4: Simplify right side
    2,680.40x = 9,733,872.60
  5. Step 5: Solve for x
    x = 9,733,872.60/2,680.40
  6. Step 6: Final answer
    x = 3,631.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.