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Finding the Fourth Proportional to 2,780.96, 4,171.44 and 833.20

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Solution

The fourth proportional to 2,780.96, 4,171.44 and 833.20 is: 1,249.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.96 : 4,171.44 = 833.20 : x
  2. Step 2: Convert to fraction form
    2,780.96/4,171.44 = 833.20/x
  3. Step 3: Cross multiply
    2,780.96x = 4,171.44 × 833.20
  4. Step 4: Simplify right side
    2,780.96x = 3,475,643.81
  5. Step 5: Solve for x
    x = 3,475,643.81/2,780.96
  6. Step 6: Final answer
    x = 1,249.80

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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.