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Finding the Fourth Proportional to 388,456.76, 536,121.42 and 218,723.96

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Solution

The fourth proportional to 388,456.76, 536,121.42 and 218,723.96 is: 301,867.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,456.76 : 536,121.42 = 218,723.96 : x
  2. Step 2: Convert to fraction form
    388,456.76/536,121.42 = 218,723.96/x
  3. Step 3: Cross multiply
    388,456.76x = 536,121.42 × 218,723.96
  4. Step 4: Simplify right side
    388,456.76x = 117,262,600,023.22
  5. Step 5: Solve for x
    x = 117,262,600,023.22/388,456.76
  6. Step 6: Final answer
    x = 301,867.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.