Home / 2,783.70-4,175.55-1,139.70

Finding the Fourth Proportional to 2,783.70, 4,175.55 and 1,139.70

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Solution

The fourth proportional to 2,783.70, 4,175.55 and 1,139.70 is: 1,709.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,783.70 : 4,175.55 = 1,139.70 : x
  2. Step 2: Convert to fraction form
    2,783.70/4,175.55 = 1,139.70/x
  3. Step 3: Cross multiply
    2,783.70x = 4,175.55 × 1,139.70
  4. Step 4: Simplify right side
    2,783.70x = 4,758,874.34
  5. Step 5: Solve for x
    x = 4,758,874.34/2,783.70
  6. Step 6: Final answer
    x = 1,709.55

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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.