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Finding the Fourth Proportional to 438,893.19, 605,721.86 and 247,918.89

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Solution

The fourth proportional to 438,893.19, 605,721.86 and 247,918.89 is: 342,155.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,893.19 : 605,721.86 = 247,918.89 : x
  2. Step 2: Convert to fraction form
    438,893.19/605,721.86 = 247,918.89/x
  3. Step 3: Cross multiply
    438,893.19x = 605,721.86 × 247,918.89
  4. Step 4: Simplify right side
    438,893.19x = 150,169,888,771.12
  5. Step 5: Solve for x
    x = 150,169,888,771.12/438,893.19
  6. Step 6: Final answer
    x = 342,155.89

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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.