Home / 1,111.22-1,667.07-380.60

Finding the Fourth Proportional to 1,111.22, 1,667.07 and 380.60

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Solution

The fourth proportional to 1,111.22, 1,667.07 and 380.60 is: 570.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,111.22 : 1,667.07 = 380.60 : x
  2. Step 2: Convert to fraction form
    1,111.22/1,667.07 = 380.60/x
  3. Step 3: Cross multiply
    1,111.22x = 1,667.07 × 380.60
  4. Step 4: Simplify right side
    1,111.22x = 634,491.01
  5. Step 5: Solve for x
    x = 634,491.01/1,111.22
  6. Step 6: Final answer
    x = 570.98

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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.