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Finding the Fourth Proportional to 2,819.68, 4,229.52 and 871.63

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Solution

The fourth proportional to 2,819.68, 4,229.52 and 871.63 is: 1,307.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.68 : 4,229.52 = 871.63 : x
  2. Step 2: Convert to fraction form
    2,819.68/4,229.52 = 871.63/x
  3. Step 3: Cross multiply
    2,819.68x = 4,229.52 × 871.63
  4. Step 4: Simplify right side
    2,819.68x = 3,686,576.52
  5. Step 5: Solve for x
    x = 3,686,576.52/2,819.68
  6. Step 6: Final answer
    x = 1,307.45

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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.