Home / 1,207.56-1,811.70-385.96

Finding the Fourth Proportional to 1,207.56, 1,811.70 and 385.96

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Solution

The fourth proportional to 1,207.56, 1,811.70 and 385.96 is: 579.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.56 : 1,811.70 = 385.96 : x
  2. Step 2: Convert to fraction form
    1,207.56/1,811.70 = 385.96/x
  3. Step 3: Cross multiply
    1,207.56x = 1,811.70 × 385.96
  4. Step 4: Simplify right side
    1,207.56x = 699,243.73
  5. Step 5: Solve for x
    x = 699,243.73/1,207.56
  6. Step 6: Final answer
    x = 579.06

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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.