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Finding the Fourth Proportional to 388,010.97, 535,449.65 and 218,244.69

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Solution

The fourth proportional to 388,010.97, 535,449.65 and 218,244.69 is: 301,174.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,010.97 : 535,449.65 = 218,244.69 : x
  2. Step 2: Convert to fraction form
    388,010.97/535,449.65 = 218,244.69/x
  3. Step 3: Cross multiply
    388,010.97x = 535,449.65 × 218,244.69
  4. Step 4: Simplify right side
    388,010.97x = 116,859,042,874.86
  5. Step 5: Solve for x
    x = 116,859,042,874.86/388,010.97
  6. Step 6: Final answer
    x = 301,174.59

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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.