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Finding the Fourth Proportional to 2,720.46, 3,752.45 and 2,129.97

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Solution

The fourth proportional to 2,720.46, 3,752.45 and 2,129.97 is: 2,937.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.46 : 3,752.45 = 2,129.97 : x
  2. Step 2: Convert to fraction form
    2,720.46/3,752.45 = 2,129.97/x
  3. Step 3: Cross multiply
    2,720.46x = 3,752.45 × 2,129.97
  4. Step 4: Simplify right side
    2,720.46x = 7,992,595.28
  5. Step 5: Solve for x
    x = 7,992,595.28/2,720.46
  6. Step 6: Final answer
    x = 2,937.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.