Home / 3,428.74-5,142.96-1,878.57

Finding the Fourth Proportional to 3,428.74, 5,142.96 and 1,878.57

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Solution

The fourth proportional to 3,428.74, 5,142.96 and 1,878.57 is: 2,817.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.74 : 5,142.96 = 1,878.57 : x
  2. Step 2: Convert to fraction form
    3,428.74/5,142.96 = 1,878.57/x
  3. Step 3: Cross multiply
    3,428.74x = 5,142.96 × 1,878.57
  4. Step 4: Simplify right side
    3,428.74x = 9,661,410.37
  5. Step 5: Solve for x
    x = 9,661,410.37/3,428.74
  6. Step 6: Final answer
    x = 2,817.77

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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.