Home / 3,728.40-5,586.20-2,429.20

Finding the Fourth Proportional to 3,728.40, 5,586.20 and 2,429.20

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Solution

The fourth proportional to 3,728.40, 5,586.20 and 2,429.20 is: 3,639.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728.40 : 5,586.20 = 2,429.20 : x
  2. Step 2: Convert to fraction form
    3,728.40/5,586.20 = 2,429.20/x
  3. Step 3: Cross multiply
    3,728.40x = 5,586.20 × 2,429.20
  4. Step 4: Simplify right side
    3,728.40x = 13,569,997.04
  5. Step 5: Solve for x
    x = 13,569,997.04/3,728.40
  6. Step 6: Final answer
    x = 3,639.63

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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.