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Finding the Fourth Proportional to 431.91, 595.04 and 321.17

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Solution

The fourth proportional to 431.91, 595.04 and 321.17 is: 442.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.91 : 595.04 = 321.17 : x
  2. Step 2: Convert to fraction form
    431.91/595.04 = 321.17/x
  3. Step 3: Cross multiply
    431.91x = 595.04 × 321.17
  4. Step 4: Simplify right side
    431.91x = 191,104.42
  5. Step 5: Solve for x
    x = 191,104.42/431.91
  6. Step 6: Final answer
    x = 442.46

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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.