Home / 2,780.78-4,171.62-1,136.88

Finding the Fourth Proportional to 2,780.78, 4,171.62 and 1,136.88

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Solution

The fourth proportional to 2,780.78, 4,171.62 and 1,136.88 is: 1,705.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.78 : 4,171.62 = 1,136.88 : x
  2. Step 2: Convert to fraction form
    2,780.78/4,171.62 = 1,136.88/x
  3. Step 3: Cross multiply
    2,780.78x = 4,171.62 × 1,136.88
  4. Step 4: Simplify right side
    2,780.78x = 4,742,631.35
  5. Step 5: Solve for x
    x = 4,742,631.35/2,780.78
  6. Step 6: Final answer
    x = 1,705.51

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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.