Home / 1,368.03-2,049.45-811.56

Finding the Fourth Proportional to 1,368.03, 2,049.45 and 811.56

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Solution

The fourth proportional to 1,368.03, 2,049.45 and 811.56 is: 1,215.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,368.03 : 2,049.45 = 811.56 : x
  2. Step 2: Convert to fraction form
    1,368.03/2,049.45 = 811.56/x
  3. Step 3: Cross multiply
    1,368.03x = 2,049.45 × 811.56
  4. Step 4: Simplify right side
    1,368.03x = 1,663,257.37
  5. Step 5: Solve for x
    x = 1,663,257.37/1,368.03
  6. Step 6: Final answer
    x = 1,215.80

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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.