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Finding the Fourth Proportional to 3,938.70, 5,908.98 and 1,341.64

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Solution

The fourth proportional to 3,938.70, 5,908.98 and 1,341.64 is: 2,012.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.70 : 5,908.98 = 1,341.64 : x
  2. Step 2: Convert to fraction form
    3,938.70/5,908.98 = 1,341.64/x
  3. Step 3: Cross multiply
    3,938.70x = 5,908.98 × 1,341.64
  4. Step 4: Simplify right side
    3,938.70x = 7,927,717.22
  5. Step 5: Solve for x
    x = 7,927,717.22/3,938.70
  6. Step 6: Final answer
    x = 2,012.77

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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.