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Finding the Fourth Proportional to 308,309.31, 425,535.48 and 187,425

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Solution

The fourth proportional to 308,309.31, 425,535.48 and 187,425 is: 258,688.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,309.31 : 425,535.48 = 187,425 : x
  2. Step 2: Convert to fraction form
    308,309.31/425,535.48 = 187,425/x
  3. Step 3: Cross multiply
    308,309.31x = 425,535.48 × 187,425
  4. Step 4: Simplify right side
    308,309.31x = 79,755,987,339
  5. Step 5: Solve for x
    x = 79,755,987,339/308,309.31
  6. Step 6: Final answer
    x = 258,688.22

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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.