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Finding the Fourth Proportional to 438,990, 605,832.12 and 247,998.48

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Solution

The fourth proportional to 438,990, 605,832.12 and 247,998.48 is: 342,252.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,990 : 605,832.12 = 247,998.48 : x
  2. Step 2: Convert to fraction form
    438,990/605,832.12 = 247,998.48/x
  3. Step 3: Cross multiply
    438,990x = 605,832.12 × 247,998.48
  4. Step 4: Simplify right side
    438,990x = 150,245,444,895.18
  5. Step 5: Solve for x
    x = 150,245,444,895.18/438,990
  6. Step 6: Final answer
    x = 342,252.55

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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.