Home / 1,215.90-1,824.39-486.02

Finding the Fourth Proportional to 1,215.90, 1,824.39 and 486.02

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Solution

The fourth proportional to 1,215.90, 1,824.39 and 486.02 is: 729.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.90 : 1,824.39 = 486.02 : x
  2. Step 2: Convert to fraction form
    1,215.90/1,824.39 = 486.02/x
  3. Step 3: Cross multiply
    1,215.90x = 1,824.39 × 486.02
  4. Step 4: Simplify right side
    1,215.90x = 886,694.59
  5. Step 5: Solve for x
    x = 886,694.59/1,215.90
  6. Step 6: Final answer
    x = 729.25

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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.