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Finding the Fourth Proportional to 2,780.78, 4,169.93 and 833.13

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Solution

The fourth proportional to 2,780.78, 4,169.93 and 833.13 is: 1,249.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.78 : 4,169.93 = 833.13 : x
  2. Step 2: Convert to fraction form
    2,780.78/4,169.93 = 833.13/x
  3. Step 3: Cross multiply
    2,780.78x = 4,169.93 × 833.13
  4. Step 4: Simplify right side
    2,780.78x = 3,474,089.62
  5. Step 5: Solve for x
    x = 3,474,089.62/2,780.78
  6. Step 6: Final answer
    x = 1,249.32

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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.