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Finding the Fourth Proportional to 3,970.65, 5,956.65 and 1,338.39

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Solution

The fourth proportional to 3,970.65, 5,956.65 and 1,338.39 is: 2,007.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.65 : 5,956.65 = 1,338.39 : x
  2. Step 2: Convert to fraction form
    3,970.65/5,956.65 = 1,338.39/x
  3. Step 3: Cross multiply
    3,970.65x = 5,956.65 × 1,338.39
  4. Step 4: Simplify right side
    3,970.65x = 7,972,320.79
  5. Step 5: Solve for x
    x = 7,972,320.79/3,970.65
  6. Step 6: Final answer
    x = 2,007.81

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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.