Home / 2,780.86-4,171.32-1,136.28

Finding the Fourth Proportional to 2,780.86, 4,171.32 and 1,136.28

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Solution

The fourth proportional to 2,780.86, 4,171.32 and 1,136.28 is: 1,704.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.86 : 4,171.32 = 1,136.28 : x
  2. Step 2: Convert to fraction form
    2,780.86/4,171.32 = 1,136.28/x
  3. Step 3: Cross multiply
    2,780.86x = 4,171.32 × 1,136.28
  4. Step 4: Simplify right side
    2,780.86x = 4,739,787.49
  5. Step 5: Solve for x
    x = 4,739,787.49/2,780.86
  6. Step 6: Final answer
    x = 1,704.43

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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.