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Finding the Fourth Proportional to 2,783.20, 4,174.20 and 1,223.20

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Solution

The fourth proportional to 2,783.20, 4,174.20 and 1,223.20 is: 1,834.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,783.20 : 4,174.20 = 1,223.20 : x
  2. Step 2: Convert to fraction form
    2,783.20/4,174.20 = 1,223.20/x
  3. Step 3: Cross multiply
    2,783.20x = 4,174.20 × 1,223.20
  4. Step 4: Simplify right side
    2,783.20x = 5,105,881.44
  5. Step 5: Solve for x
    x = 5,105,881.44/2,783.20
  6. Step 6: Final answer
    x = 1,834.54

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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.