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Finding the Fourth Proportional to 386,303.86, 579,538.86 and 130,161.88

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Solution

The fourth proportional to 386,303.86, 579,538.86 and 130,161.88 is: 195,270.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,303.86 : 579,538.86 = 130,161.88 : x
  2. Step 2: Convert to fraction form
    386,303.86/579,538.86 = 130,161.88/x
  3. Step 3: Cross multiply
    386,303.86x = 579,538.86 × 130,161.88
  4. Step 4: Simplify right side
    386,303.86x = 75,433,867,550.66
  5. Step 5: Solve for x
    x = 75,433,867,550.66/386,303.86
  6. Step 6: Final answer
    x = 195,270.81

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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.