Home / 1,921.56-2,880.38-750.84

Finding the Fourth Proportional to 1,921.56, 2,880.38 and 750.84

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Solution

The fourth proportional to 1,921.56, 2,880.38 and 750.84 is: 1,125.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.56 : 2,880.38 = 750.84 : x
  2. Step 2: Convert to fraction form
    1,921.56/2,880.38 = 750.84/x
  3. Step 3: Cross multiply
    1,921.56x = 2,880.38 × 750.84
  4. Step 4: Simplify right side
    1,921.56x = 2,162,704.52
  5. Step 5: Solve for x
    x = 2,162,704.52/1,921.56
  6. Step 6: Final answer
    x = 1,125.49

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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.