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Finding the Fourth Proportional to 438,760.78, 605,489.91 and 247,786.47

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Solution

The fourth proportional to 438,760.78, 605,489.91 and 247,786.47 is: 341,945.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,760.78 : 605,489.91 = 247,786.47 : x
  2. Step 2: Convert to fraction form
    438,760.78/605,489.91 = 247,786.47/x
  3. Step 3: Cross multiply
    438,760.78x = 605,489.91 × 247,786.47
  4. Step 4: Simplify right side
    438,760.78x = 150,032,207,419.52
  5. Step 5: Solve for x
    x = 150,032,207,419.52/438,760.78
  6. Step 6: Final answer
    x = 341,945.35

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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.