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Finding the Fourth Proportional to 3,842.40, 5,763.60 and 3,664.20

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Solution

The fourth proportional to 3,842.40, 5,763.60 and 3,664.20 is: 5,496.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,842.40 : 5,763.60 = 3,664.20 : x
  2. Step 2: Convert to fraction form
    3,842.40/5,763.60 = 3,664.20/x
  3. Step 3: Cross multiply
    3,842.40x = 5,763.60 × 3,664.20
  4. Step 4: Simplify right side
    3,842.40x = 21,118,983.12
  5. Step 5: Solve for x
    x = 21,118,983.12/3,842.40
  6. Step 6: Final answer
    x = 5,496.30

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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.