Home / 1,216.30-1,824.45-338.80

Finding the Fourth Proportional to 1,216.30, 1,824.45 and 338.80

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Solution

The fourth proportional to 1,216.30, 1,824.45 and 338.80 is: 508.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.30 : 1,824.45 = 338.80 : x
  2. Step 2: Convert to fraction form
    1,216.30/1,824.45 = 338.80/x
  3. Step 3: Cross multiply
    1,216.30x = 1,824.45 × 338.80
  4. Step 4: Simplify right side
    1,216.30x = 618,123.66
  5. Step 5: Solve for x
    x = 618,123.66/1,216.30
  6. Step 6: Final answer
    x = 508.20

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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.