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Finding the Fourth Proportional to 388,321.44, 535,882.38 and 218,555.52

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Solution

The fourth proportional to 388,321.44, 535,882.38 and 218,555.52 is: 301,605.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,321.44 : 535,882.38 = 218,555.52 : x
  2. Step 2: Convert to fraction form
    388,321.44/535,882.38 = 218,555.52/x
  3. Step 3: Cross multiply
    388,321.44x = 535,882.38 × 218,555.52
  4. Step 4: Simplify right side
    388,321.44x = 117,120,052,219.74
  5. Step 5: Solve for x
    x = 117,120,052,219.74/388,321.44
  6. Step 6: Final answer
    x = 301,605.94

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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.