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Finding the Fourth Proportional to 1,784.97, 2,672.87 and 809.19

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Solution

The fourth proportional to 1,784.97, 2,672.87 and 809.19 is: 1,211.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,784.97 : 2,672.87 = 809.19 : x
  2. Step 2: Convert to fraction form
    1,784.97/2,672.87 = 809.19/x
  3. Step 3: Cross multiply
    1,784.97x = 2,672.87 × 809.19
  4. Step 4: Simplify right side
    1,784.97x = 2,162,855.63
  5. Step 5: Solve for x
    x = 2,162,855.63/1,784.97
  6. Step 6: Final answer
    x = 1,211.70

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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.