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Finding the Fourth Proportional to 2,778.96, 4,168.40 and 698.96

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Solution

The fourth proportional to 2,778.96, 4,168.40 and 698.96 is: 1,048.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,778.96 : 4,168.40 = 698.96 : x
  2. Step 2: Convert to fraction form
    2,778.96/4,168.40 = 698.96/x
  3. Step 3: Cross multiply
    2,778.96x = 4,168.40 × 698.96
  4. Step 4: Simplify right side
    2,778.96x = 2,913,544.86
  5. Step 5: Solve for x
    x = 2,913,544.86/2,778.96
  6. Step 6: Final answer
    x = 1,048.43

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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.