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Finding the Fourth Proportional to 3,143.92, 4,335.78 and 1,965.16

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Solution

The fourth proportional to 3,143.92, 4,335.78 and 1,965.16 is: 2,710.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,143.92 : 4,335.78 = 1,965.16 : x
  2. Step 2: Convert to fraction form
    3,143.92/4,335.78 = 1,965.16/x
  3. Step 3: Cross multiply
    3,143.92x = 4,335.78 × 1,965.16
  4. Step 4: Simplify right side
    3,143.92x = 8,520,501.42
  5. Step 5: Solve for x
    x = 8,520,501.42/3,143.92
  6. Step 6: Final answer
    x = 2,710.15

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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.