Home / 2,145.28-3,219.12-846.64

Finding the Fourth Proportional to 2,145.28, 3,219.12 and 846.64

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Solution

The fourth proportional to 2,145.28, 3,219.12 and 846.64 is: 1,270.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.28 : 3,219.12 = 846.64 : x
  2. Step 2: Convert to fraction form
    2,145.28/3,219.12 = 846.64/x
  3. Step 3: Cross multiply
    2,145.28x = 3,219.12 × 846.64
  4. Step 4: Simplify right side
    2,145.28x = 2,725,435.76
  5. Step 5: Solve for x
    x = 2,725,435.76/2,145.28
  6. Step 6: Final answer
    x = 1,270.43

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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.