Home / 3,578.87-5,367.40-1,386.40

Finding the Fourth Proportional to 3,578.87, 5,367.40 and 1,386.40

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Solution

The fourth proportional to 3,578.87, 5,367.40 and 1,386.40 is: 2,079.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,578.87 : 5,367.40 = 1,386.40 : x
  2. Step 2: Convert to fraction form
    3,578.87/5,367.40 = 1,386.40/x
  3. Step 3: Cross multiply
    3,578.87x = 5,367.40 × 1,386.40
  4. Step 4: Simplify right side
    3,578.87x = 7,441,363.36
  5. Step 5: Solve for x
    x = 7,441,363.36/3,578.87
  6. Step 6: Final answer
    x = 2,079.25

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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.