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Finding the Fourth Proportional to 2,811.52, 3,880.20 and 1,763.92

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Solution

The fourth proportional to 2,811.52, 3,880.20 and 1,763.92 is: 2,434.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.52 : 3,880.20 = 1,763.92 : x
  2. Step 2: Convert to fraction form
    2,811.52/3,880.20 = 1,763.92/x
  3. Step 3: Cross multiply
    2,811.52x = 3,880.20 × 1,763.92
  4. Step 4: Simplify right side
    2,811.52x = 6,844,362.38
  5. Step 5: Solve for x
    x = 6,844,362.38/2,811.52
  6. Step 6: Final answer
    x = 2,434.40

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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.