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Finding the Fourth Proportional to 4,086.80, 6,124.80 and 3,622.40

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Solution

The fourth proportional to 4,086.80, 6,124.80 and 3,622.40 is: 5,428.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,086.80 : 6,124.80 = 3,622.40 : x
  2. Step 2: Convert to fraction form
    4,086.80/6,124.80 = 3,622.40/x
  3. Step 3: Cross multiply
    4,086.80x = 6,124.80 × 3,622.40
  4. Step 4: Simplify right side
    4,086.80x = 22,186,475.52
  5. Step 5: Solve for x
    x = 22,186,475.52/4,086.80
  6. Step 6: Final answer
    x = 5,428.81

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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.