Home / 3,878.25-5,817.51-1,281.39

Finding the Fourth Proportional to 3,878.25, 5,817.51 and 1,281.39

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Solution

The fourth proportional to 3,878.25, 5,817.51 and 1,281.39 is: 1,922.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.25 : 5,817.51 = 1,281.39 : x
  2. Step 2: Convert to fraction form
    3,878.25/5,817.51 = 1,281.39/x
  3. Step 3: Cross multiply
    3,878.25x = 5,817.51 × 1,281.39
  4. Step 4: Simplify right side
    3,878.25x = 7,454,499.14
  5. Step 5: Solve for x
    x = 7,454,499.14/3,878.25
  6. Step 6: Final answer
    x = 1,922.13

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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.