Home / 1,215.32-1,822.56-393.41

Finding the Fourth Proportional to 1,215.32, 1,822.56 and 393.41

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Solution

The fourth proportional to 1,215.32, 1,822.56 and 393.41 is: 589.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,215.32 : 1,822.56 = 393.41 : x
  2. Step 2: Convert to fraction form
    1,215.32/1,822.56 = 393.41/x
  3. Step 3: Cross multiply
    1,215.32x = 1,822.56 × 393.41
  4. Step 4: Simplify right side
    1,215.32x = 717,004.22
  5. Step 5: Solve for x
    x = 717,004.22/1,215.32
  6. Step 6: Final answer
    x = 589.97

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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.