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Finding the Fourth Proportional to 395,887.67, 545,972.23 and 308,694.38

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Solution

The fourth proportional to 395,887.67, 545,972.23 and 308,694.38 is: 425,723.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,887.67 : 545,972.23 = 308,694.38 : x
  2. Step 2: Convert to fraction form
    395,887.67/545,972.23 = 308,694.38/x
  3. Step 3: Cross multiply
    395,887.67x = 545,972.23 × 308,694.38
  4. Step 4: Simplify right side
    395,887.67x = 168,538,556,693.07
  5. Step 5: Solve for x
    x = 168,538,556,693.07/395,887.67
  6. Step 6: Final answer
    x = 425,723.18

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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.