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Finding the Fourth Proportional to 2,378.68, 3,568.92 and 917.92

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Solution

The fourth proportional to 2,378.68, 3,568.92 and 917.92 is: 1,377.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,378.68 : 3,568.92 = 917.92 : x
  2. Step 2: Convert to fraction form
    2,378.68/3,568.92 = 917.92/x
  3. Step 3: Cross multiply
    2,378.68x = 3,568.92 × 917.92
  4. Step 4: Simplify right side
    2,378.68x = 3,275,983.05
  5. Step 5: Solve for x
    x = 3,275,983.05/2,378.68
  6. Step 6: Final answer
    x = 1,377.23

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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.