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Finding the Fourth Proportional to 2,639.92, 3,951.28 and 1,946.30

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Solution

The fourth proportional to 2,639.92, 3,951.28 and 1,946.30 is: 2,913.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.92 : 3,951.28 = 1,946.30 : x
  2. Step 2: Convert to fraction form
    2,639.92/3,951.28 = 1,946.30/x
  3. Step 3: Cross multiply
    2,639.92x = 3,951.28 × 1,946.30
  4. Step 4: Simplify right side
    2,639.92x = 7,690,376.26
  5. Step 5: Solve for x
    x = 7,690,376.26/2,639.92
  6. Step 6: Final answer
    x = 2,913.11

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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.