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Finding the Fourth Proportional to 439.39, 657.70 and 301.63

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Solution

The fourth proportional to 439.39, 657.70 and 301.63 is: 451.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.39 : 657.70 = 301.63 : x
  2. Step 2: Convert to fraction form
    439.39/657.70 = 301.63/x
  3. Step 3: Cross multiply
    439.39x = 657.70 × 301.63
  4. Step 4: Simplify right side
    439.39x = 198,382.05
  5. Step 5: Solve for x
    x = 198,382.05/439.39
  6. Step 6: Final answer
    x = 451.49

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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.