Home / 1,111.27-1,667.24-380.85

Finding the Fourth Proportional to 1,111.27, 1,667.24 and 380.85

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Solution

The fourth proportional to 1,111.27, 1,667.24 and 380.85 is: 571.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,111.27 : 1,667.24 = 380.85 : x
  2. Step 2: Convert to fraction form
    1,111.27/1,667.24 = 380.85/x
  3. Step 3: Cross multiply
    1,111.27x = 1,667.24 × 380.85
  4. Step 4: Simplify right side
    1,111.27x = 634,968.35
  5. Step 5: Solve for x
    x = 634,968.35/1,111.27
  6. Step 6: Final answer
    x = 571.39

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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.