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Finding the Fourth Proportional to 3,942.40, 5,337.60 and 3,942.40

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Solution

The fourth proportional to 3,942.40, 5,337.60 and 3,942.40 is: 5,337.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.40 : 5,337.60 = 3,942.40 : x
  2. Step 2: Convert to fraction form
    3,942.40/5,337.60 = 3,942.40/x
  3. Step 3: Cross multiply
    3,942.40x = 5,337.60 × 3,942.40
  4. Step 4: Simplify right side
    3,942.40x = 21,042,954.24
  5. Step 5: Solve for x
    x = 21,042,954.24/3,942.40
  6. Step 6: Final answer
    x = 5,337.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.