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Finding the Fourth Proportional to 1,679.92, 2,520.42 and 814.84

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Solution

The fourth proportional to 1,679.92, 2,520.42 and 814.84 is: 1,222.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.92 : 2,520.42 = 814.84 : x
  2. Step 2: Convert to fraction form
    1,679.92/2,520.42 = 814.84/x
  3. Step 3: Cross multiply
    1,679.92x = 2,520.42 × 814.84
  4. Step 4: Simplify right side
    1,679.92x = 2,053,739.03
  5. Step 5: Solve for x
    x = 2,053,739.03/1,679.92
  6. Step 6: Final answer
    x = 1,222.52

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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.