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Finding the Fourth Proportional to 2,143.74, 3,215.48 and 757.10

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Solution

The fourth proportional to 2,143.74, 3,215.48 and 757.10 is: 1,135.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.74 : 3,215.48 = 757.10 : x
  2. Step 2: Convert to fraction form
    2,143.74/3,215.48 = 757.10/x
  3. Step 3: Cross multiply
    2,143.74x = 3,215.48 × 757.10
  4. Step 4: Simplify right side
    2,143.74x = 2,434,439.91
  5. Step 5: Solve for x
    x = 2,434,439.91/2,143.74
  6. Step 6: Final answer
    x = 1,135.60

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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.