Home / 3,878.28-5,817.48-1,281.12

Finding the Fourth Proportional to 3,878.28, 5,817.48 and 1,281.12

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Solution

The fourth proportional to 3,878.28, 5,817.48 and 1,281.12 is: 1,921.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.28 : 5,817.48 = 1,281.12 : x
  2. Step 2: Convert to fraction form
    3,878.28/5,817.48 = 1,281.12/x
  3. Step 3: Cross multiply
    3,878.28x = 5,817.48 × 1,281.12
  4. Step 4: Simplify right side
    3,878.28x = 7,452,889.98
  5. Step 5: Solve for x
    x = 7,452,889.98/3,878.28
  6. Step 6: Final answer
    x = 1,921.70

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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.