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Finding the Fourth Proportional to 438,892.85, 605,721.39 and 247,918.55

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Solution

The fourth proportional to 438,892.85, 605,721.39 and 247,918.55 is: 342,155.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,892.85 : 605,721.39 = 247,918.55 : x
  2. Step 2: Convert to fraction form
    438,892.85/605,721.39 = 247,918.55/x
  3. Step 3: Cross multiply
    438,892.85x = 605,721.39 × 247,918.55
  4. Step 4: Simplify right side
    438,892.85x = 150,169,565,684.18
  5. Step 5: Solve for x
    x = 150,169,565,684.18/438,892.85
  6. Step 6: Final answer
    x = 342,155.42

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1.5x scale

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.