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Finding the Fourth Proportional to 3,163.72, 4,721.18 and 2,779.76

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Solution

The fourth proportional to 3,163.72, 4,721.18 and 2,779.76 is: 4,148.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,163.72 : 4,721.18 = 2,779.76 : x
  2. Step 2: Convert to fraction form
    3,163.72/4,721.18 = 2,779.76/x
  3. Step 3: Cross multiply
    3,163.72x = 4,721.18 × 2,779.76
  4. Step 4: Simplify right side
    3,163.72x = 13,123,747.32
  5. Step 5: Solve for x
    x = 13,123,747.32/3,163.72
  6. Step 6: Final answer
    x = 4,148.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.