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Finding the Fourth Proportional to 2,143.22, 3,215.05 and 910.75

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Solution

The fourth proportional to 2,143.22, 3,215.05 and 910.75 is: 1,366.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.22 : 3,215.05 = 910.75 : x
  2. Step 2: Convert to fraction form
    2,143.22/3,215.05 = 910.75/x
  3. Step 3: Cross multiply
    2,143.22x = 3,215.05 × 910.75
  4. Step 4: Simplify right side
    2,143.22x = 2,928,106.79
  5. Step 5: Solve for x
    x = 2,928,106.79/2,143.22
  6. Step 6: Final answer
    x = 1,366.22

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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.