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Finding the Fourth Proportional to 258,346.89, 387,055.33 and 243,149.44

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Solution

The fourth proportional to 258,346.89, 387,055.33 and 243,149.44 is: 364,286.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,346.89 : 387,055.33 = 243,149.44 : x
  2. Step 2: Convert to fraction form
    258,346.89/387,055.33 = 243,149.44/x
  3. Step 3: Cross multiply
    258,346.89x = 387,055.33 × 243,149.44
  4. Step 4: Simplify right side
    258,346.89x = 94,112,287,706.15
  5. Step 5: Solve for x
    x = 94,112,287,706.15/258,346.89
  6. Step 6: Final answer
    x = 364,286.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.