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Finding the Fourth Proportional to 397,665.72, 548,982 and 306,817.56

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Solution

The fourth proportional to 397,665.72, 548,982 and 306,817.56 is: 423,565.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,665.72 : 548,982 = 306,817.56 : x
  2. Step 2: Convert to fraction form
    397,665.72/548,982 = 306,817.56/x
  3. Step 3: Cross multiply
    397,665.72x = 548,982 × 306,817.56
  4. Step 4: Simplify right side
    397,665.72x = 168,437,317,723.92
  5. Step 5: Solve for x
    x = 168,437,317,723.92/397,665.72
  6. Step 6: Final answer
    x = 423,565.09

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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.