Home / 1,215.38-1,822.91-394.22

Finding the Fourth Proportional to 1,215.38, 1,822.91 and 394.22

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Solution

The fourth proportional to 1,215.38, 1,822.91 and 394.22 is: 591.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.38 : 1,822.91 = 394.22 : x
  2. Step 2: Convert to fraction form
    1,215.38/1,822.91 = 394.22/x
  3. Step 3: Cross multiply
    1,215.38x = 1,822.91 × 394.22
  4. Step 4: Simplify right side
    1,215.38x = 718,616.49
  5. Step 5: Solve for x
    x = 718,616.49/1,215.38
  6. Step 6: Final answer
    x = 591.27

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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.