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Finding the Fourth Proportional to 308,504.89, 425,768.16 and 187,654.51

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Solution

The fourth proportional to 308,504.89, 425,768.16 and 187,654.51 is: 258,982.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,504.89 : 425,768.16 = 187,654.51 : x
  2. Step 2: Convert to fraction form
    308,504.89/425,768.16 = 187,654.51/x
  3. Step 3: Cross multiply
    308,504.89x = 425,768.16 × 187,654.51
  4. Step 4: Simplify right side
    308,504.89x = 79,897,315,438.40
  5. Step 5: Solve for x
    x = 79,897,315,438.40/308,504.89
  6. Step 6: Final answer
    x = 258,982.33

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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.