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Finding the Fourth Proportional to 3,782.79, 5,220.18 and 2,104.20

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Solution

The fourth proportional to 3,782.79, 5,220.18 and 2,104.20 is: 2,903.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,782.79 : 5,220.18 = 2,104.20 : x
  2. Step 2: Convert to fraction form
    3,782.79/5,220.18 = 2,104.20/x
  3. Step 3: Cross multiply
    3,782.79x = 5,220.18 × 2,104.20
  4. Step 4: Simplify right side
    3,782.79x = 10,984,302.76
  5. Step 5: Solve for x
    x = 10,984,302.76/3,782.79
  6. Step 6: Final answer
    x = 2,903.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.