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Finding the Fourth Proportional to 398,561.92, 550,211.82 and 276,147.14

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Solution

The fourth proportional to 398,561.92, 550,211.82 and 276,147.14 is: 381,219.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,561.92 : 550,211.82 = 276,147.14 : x
  2. Step 2: Convert to fraction form
    398,561.92/550,211.82 = 276,147.14/x
  3. Step 3: Cross multiply
    398,561.92x = 550,211.82 × 276,147.14
  4. Step 4: Simplify right side
    398,561.92x = 151,939,420,487.20
  5. Step 5: Solve for x
    x = 151,939,420,487.20/398,561.92
  6. Step 6: Final answer
    x = 381,219.11

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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.