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Finding the Fourth Proportional to 438,679.55, 605,388.79 and 247,694.30

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Solution

The fourth proportional to 438,679.55, 605,388.79 and 247,694.30 is: 341,824.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,679.55 : 605,388.79 = 247,694.30 : x
  2. Step 2: Convert to fraction form
    438,679.55/605,388.79 = 247,694.30/x
  3. Step 3: Cross multiply
    438,679.55x = 605,388.79 × 247,694.30
  4. Step 4: Simplify right side
    438,679.55x = 149,951,354,131.81
  5. Step 5: Solve for x
    x = 149,951,354,131.81/438,679.55
  6. Step 6: Final answer
    x = 341,824.36

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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.