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Finding the Fourth Proportional to 431.31, 595.77 and 321.33

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Solution

The fourth proportional to 431.31, 595.77 and 321.33 is: 443.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.31 : 595.77 = 321.33 : x
  2. Step 2: Convert to fraction form
    431.31/595.77 = 321.33/x
  3. Step 3: Cross multiply
    431.31x = 595.77 × 321.33
  4. Step 4: Simplify right side
    431.31x = 191,438.77
  5. Step 5: Solve for x
    x = 191,438.77/431.31
  6. Step 6: Final answer
    x = 443.85

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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.