Home / 2,815.94-3,885.38-1,636.40

Finding the Fourth Proportional to 2,815.94, 3,885.38 and 1,636.40

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Solution

The fourth proportional to 2,815.94, 3,885.38 and 1,636.40 is: 2,257.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.94 : 3,885.38 = 1,636.40 : x
  2. Step 2: Convert to fraction form
    2,815.94/3,885.38 = 1,636.40/x
  3. Step 3: Cross multiply
    2,815.94x = 3,885.38 × 1,636.40
  4. Step 4: Simplify right side
    2,815.94x = 6,358,035.83
  5. Step 5: Solve for x
    x = 6,358,035.83/2,815.94
  6. Step 6: Final answer
    x = 2,257.87

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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.