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Finding the Fourth Proportional to 2,818.94, 4,228.47 and 872.51

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Solution

The fourth proportional to 2,818.94, 4,228.47 and 872.51 is: 1,308.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,818.94 : 4,228.47 = 872.51 : x
  2. Step 2: Convert to fraction form
    2,818.94/4,228.47 = 872.51/x
  3. Step 3: Cross multiply
    2,818.94x = 4,228.47 × 872.51
  4. Step 4: Simplify right side
    2,818.94x = 3,689,361.22
  5. Step 5: Solve for x
    x = 3,689,361.22/2,818.94
  6. Step 6: Final answer
    x = 1,308.78

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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.