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Finding the Fourth Proportional to 393,490.82, 590,234.04 and 340,020.21

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Solution

The fourth proportional to 393,490.82, 590,234.04 and 340,020.21 is: 510,028.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,490.82 : 590,234.04 = 340,020.21 : x
  2. Step 2: Convert to fraction form
    393,490.82/590,234.04 = 340,020.21/x
  3. Step 3: Cross multiply
    393,490.82x = 590,234.04 × 340,020.21
  4. Step 4: Simplify right side
    393,490.82x = 200,691,502,229.95
  5. Step 5: Solve for x
    x = 200,691,502,229.95/393,490.82
  6. Step 6: Final answer
    x = 510,028.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.