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Finding the Fourth Proportional to 437.90, 604.49 and 311.94

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Solution

The fourth proportional to 437.90, 604.49 and 311.94 is: 430.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.90 : 604.49 = 311.94 : x
  2. Step 2: Convert to fraction form
    437.90/604.49 = 311.94/x
  3. Step 3: Cross multiply
    437.90x = 604.49 × 311.94
  4. Step 4: Simplify right side
    437.90x = 188,564.61
  5. Step 5: Solve for x
    x = 188,564.61/437.90
  6. Step 6: Final answer
    x = 430.61

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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.