Home / 386,778.06-580,165.38-120,538.80

Finding the Fourth Proportional to 386,778.06, 580,165.38 and 120,538.80

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Solution

The fourth proportional to 386,778.06, 580,165.38 and 120,538.80 is: 180,807.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,778.06 : 580,165.38 = 120,538.80 : x
  2. Step 2: Convert to fraction form
    386,778.06/580,165.38 = 120,538.80/x
  3. Step 3: Cross multiply
    386,778.06x = 580,165.38 × 120,538.80
  4. Step 4: Simplify right side
    386,778.06x = 69,932,438,706.74
  5. Step 5: Solve for x
    x = 69,932,438,706.74/386,778.06
  6. Step 6: Final answer
    x = 180,807.67

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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.