Home / 2,688.14-3,709.84-1,640.40

Finding the Fourth Proportional to 2,688.14, 3,709.84 and 1,640.40

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Solution

The fourth proportional to 2,688.14, 3,709.84 and 1,640.40 is: 2,263.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.14 : 3,709.84 = 1,640.40 : x
  2. Step 2: Convert to fraction form
    2,688.14/3,709.84 = 1,640.40/x
  3. Step 3: Cross multiply
    2,688.14x = 3,709.84 × 1,640.40
  4. Step 4: Simplify right side
    2,688.14x = 6,085,621.54
  5. Step 5: Solve for x
    x = 6,085,621.54/2,688.14
  6. Step 6: Final answer
    x = 2,263.88

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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.