Home / 2,557.78-3,836.70-1,685.86

Finding the Fourth Proportional to 2,557.78, 3,836.70 and 1,685.86

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Solution

The fourth proportional to 2,557.78, 3,836.70 and 1,685.86 is: 2,528.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,557.78 : 3,836.70 = 1,685.86 : x
  2. Step 2: Convert to fraction form
    2,557.78/3,836.70 = 1,685.86/x
  3. Step 3: Cross multiply
    2,557.78x = 3,836.70 × 1,685.86
  4. Step 4: Simplify right side
    2,557.78x = 6,468,139.06
  5. Step 5: Solve for x
    x = 6,468,139.06/2,557.78
  6. Step 6: Final answer
    x = 2,528.81

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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.