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Finding the Fourth Proportional to 398,872.46, 550,647.16 and 308,024.48

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Solution

The fourth proportional to 398,872.46, 550,647.16 and 308,024.48 is: 425,230.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,872.46 : 550,647.16 = 308,024.48 : x
  2. Step 2: Convert to fraction form
    398,872.46/550,647.16 = 308,024.48/x
  3. Step 3: Cross multiply
    398,872.46x = 550,647.16 × 308,024.48
  4. Step 4: Simplify right side
    398,872.46x = 169,612,805,122.48
  5. Step 5: Solve for x
    x = 169,612,805,122.48/398,872.46
  6. Step 6: Final answer
    x = 425,230.67

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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.