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Finding the Fourth Proportional to 2,143.92, 3,215.48 and 756.92

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Solution

The fourth proportional to 2,143.92, 3,215.48 and 756.92 is: 1,135.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.92 : 3,215.48 = 756.92 : x
  2. Step 2: Convert to fraction form
    2,143.92/3,215.48 = 756.92/x
  3. Step 3: Cross multiply
    2,143.92x = 3,215.48 × 756.92
  4. Step 4: Simplify right side
    2,143.92x = 2,433,861.12
  5. Step 5: Solve for x
    x = 2,433,861.12/2,143.92
  6. Step 6: Final answer
    x = 1,135.24

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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.