Home / 1,252.20-1,878.09-386.52

Finding the Fourth Proportional to 1,252.20, 1,878.09 and 386.52

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Solution

The fourth proportional to 1,252.20, 1,878.09 and 386.52 is: 579.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,252.20 : 1,878.09 = 386.52 : x
  2. Step 2: Convert to fraction form
    1,252.20/1,878.09 = 386.52/x
  3. Step 3: Cross multiply
    1,252.20x = 1,878.09 × 386.52
  4. Step 4: Simplify right side
    1,252.20x = 725,919.35
  5. Step 5: Solve for x
    x = 725,919.35/1,252.20
  6. Step 6: Final answer
    x = 579.72

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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.