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Finding the Fourth Proportional to 2,819.28, 4,229.32 and 871.64

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Solution

The fourth proportional to 2,819.28, 4,229.32 and 871.64 is: 1,307.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.28 : 4,229.32 = 871.64 : x
  2. Step 2: Convert to fraction form
    2,819.28/4,229.32 = 871.64/x
  3. Step 3: Cross multiply
    2,819.28x = 4,229.32 × 871.64
  4. Step 4: Simplify right side
    2,819.28x = 3,686,444.48
  5. Step 5: Solve for x
    x = 3,686,444.48/2,819.28
  6. Step 6: Final answer
    x = 1,307.58

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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.