Home / 1,815.18-2,725.42-1,124.78

Finding the Fourth Proportional to 1,815.18, 2,725.42 and 1,124.78

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Solution

The fourth proportional to 1,815.18, 2,725.42 and 1,124.78 is: 1,688.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.18 : 2,725.42 = 1,124.78 : x
  2. Step 2: Convert to fraction form
    1,815.18/2,725.42 = 1,124.78/x
  3. Step 3: Cross multiply
    1,815.18x = 2,725.42 × 1,124.78
  4. Step 4: Simplify right side
    1,815.18x = 3,065,497.91
  5. Step 5: Solve for x
    x = 3,065,497.91/1,815.18
  6. Step 6: Final answer
    x = 1,688.81

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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.