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Finding the Fourth Proportional to 1,809.25, 2,713.87 and 654.19

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Solution

The fourth proportional to 1,809.25, 2,713.87 and 654.19 is: 981.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,809.25 : 2,713.87 = 654.19 : x
  2. Step 2: Convert to fraction form
    1,809.25/2,713.87 = 654.19/x
  3. Step 3: Cross multiply
    1,809.25x = 2,713.87 × 654.19
  4. Step 4: Simplify right side
    1,809.25x = 1,775,380.65
  5. Step 5: Solve for x
    x = 1,775,380.65/1,809.25
  6. Step 6: Final answer
    x = 981.28

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Double scale
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Similar ratio
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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.