Home / 727.41-1,091.15-380.55

Finding the Fourth Proportional to 727.41, 1,091.15 and 380.55

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Solution

The fourth proportional to 727.41, 1,091.15 and 380.55 is: 570.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.41 : 1,091.15 = 380.55 : x
  2. Step 2: Convert to fraction form
    727.41/1,091.15 = 380.55/x
  3. Step 3: Cross multiply
    727.41x = 1,091.15 × 380.55
  4. Step 4: Simplify right side
    727.41x = 415,235.23
  5. Step 5: Solve for x
    x = 415,235.23/727.41
  6. Step 6: Final answer
    x = 570.84

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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.