Home / 3,578.40-5,368.95-1,388.61

Finding the Fourth Proportional to 3,578.40, 5,368.95 and 1,388.61

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Solution

The fourth proportional to 3,578.40, 5,368.95 and 1,388.61 is: 2,083.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,578.40 : 5,368.95 = 1,388.61 : x
  2. Step 2: Convert to fraction form
    3,578.40/5,368.95 = 1,388.61/x
  3. Step 3: Cross multiply
    3,578.40x = 5,368.95 × 1,388.61
  4. Step 4: Simplify right side
    3,578.40x = 7,455,377.66
  5. Step 5: Solve for x
    x = 7,455,377.66/3,578.40
  6. Step 6: Final answer
    x = 2,083.44

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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.