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Finding the Fourth Proportional to 2,239.70, 3,361.08 and 778.84

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Solution

The fourth proportional to 2,239.70, 3,361.08 and 778.84 is: 1,168.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,239.70 : 3,361.08 = 778.84 : x
  2. Step 2: Convert to fraction form
    2,239.70/3,361.08 = 778.84/x
  3. Step 3: Cross multiply
    2,239.70x = 3,361.08 × 778.84
  4. Step 4: Simplify right side
    2,239.70x = 2,617,743.55
  5. Step 5: Solve for x
    x = 2,617,743.55/2,239.70
  6. Step 6: Final answer
    x = 1,168.79

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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.