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Finding the Fourth Proportional to 1,680.24, 2,520.76 and 756.24

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Solution

The fourth proportional to 1,680.24, 2,520.76 and 756.24 is: 1,134.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.24 : 2,520.76 = 756.24 : x
  2. Step 2: Convert to fraction form
    1,680.24/2,520.76 = 756.24/x
  3. Step 3: Cross multiply
    1,680.24x = 2,520.76 × 756.24
  4. Step 4: Simplify right side
    1,680.24x = 1,906,299.54
  5. Step 5: Solve for x
    x = 1,906,299.54/1,680.24
  6. Step 6: Final answer
    x = 1,134.54

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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.