Home / 1,478.28-2,217.36-827.64

Finding the Fourth Proportional to 1,478.28, 2,217.36 and 827.64

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Solution

The fourth proportional to 1,478.28, 2,217.36 and 827.64 is: 1,241.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.28 : 2,217.36 = 827.64 : x
  2. Step 2: Convert to fraction form
    1,478.28/2,217.36 = 827.64/x
  3. Step 3: Cross multiply
    1,478.28x = 2,217.36 × 827.64
  4. Step 4: Simplify right side
    1,478.28x = 1,835,175.83
  5. Step 5: Solve for x
    x = 1,835,175.83/1,478.28
  6. Step 6: Final answer
    x = 1,241.43

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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.