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Finding the Fourth Proportional to 2,655.36, 3,983.04 and 806.49

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Solution

The fourth proportional to 2,655.36, 3,983.04 and 806.49 is: 1,209.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655.36 : 3,983.04 = 806.49 : x
  2. Step 2: Convert to fraction form
    2,655.36/3,983.04 = 806.49/x
  3. Step 3: Cross multiply
    2,655.36x = 3,983.04 × 806.49
  4. Step 4: Simplify right side
    2,655.36x = 3,212,281.93
  5. Step 5: Solve for x
    x = 3,212,281.93/2,655.36
  6. Step 6: Final answer
    x = 1,209.74

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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.