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Finding the Fourth Proportional to 321.37, 442.56 and 301.59

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Solution

The fourth proportional to 321.37, 442.56 and 301.59 is: 415.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.37 : 442.56 = 301.59 : x
  2. Step 2: Convert to fraction form
    321.37/442.56 = 301.59/x
  3. Step 3: Cross multiply
    321.37x = 442.56 × 301.59
  4. Step 4: Simplify right side
    321.37x = 133,471.67
  5. Step 5: Solve for x
    x = 133,471.67/321.37
  6. Step 6: Final answer
    x = 415.32

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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.