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Finding the Fourth Proportional to 2,165.92, 3,242.76 and 1,960.88

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Solution

The fourth proportional to 2,165.92, 3,242.76 and 1,960.88 is: 2,935.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.92 : 3,242.76 = 1,960.88 : x
  2. Step 2: Convert to fraction form
    2,165.92/3,242.76 = 1,960.88/x
  3. Step 3: Cross multiply
    2,165.92x = 3,242.76 × 1,960.88
  4. Step 4: Simplify right side
    2,165.92x = 6,358,663.23
  5. Step 5: Solve for x
    x = 6,358,663.23/2,165.92
  6. Step 6: Final answer
    x = 2,935.78

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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.