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Finding the Fourth Proportional to 2,872.45, 3,966.45 and 2,779.57

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Solution

The fourth proportional to 2,872.45, 3,966.45 and 2,779.57 is: 3,838.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,872.45 : 3,966.45 = 2,779.57 : x
  2. Step 2: Convert to fraction form
    2,872.45/3,966.45 = 2,779.57/x
  3. Step 3: Cross multiply
    2,872.45x = 3,966.45 × 2,779.57
  4. Step 4: Simplify right side
    2,872.45x = 11,025,011.53
  5. Step 5: Solve for x
    x = 11,025,011.53/2,872.45
  6. Step 6: Final answer
    x = 3,838.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.