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Finding the Fourth Proportional to 431.13, 594.40 and 320.41

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Solution

The fourth proportional to 431.13, 594.40 and 320.41 is: 441.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.13 : 594.40 = 320.41 : x
  2. Step 2: Convert to fraction form
    431.13/594.40 = 320.41/x
  3. Step 3: Cross multiply
    431.13x = 594.40 × 320.41
  4. Step 4: Simplify right side
    431.13x = 190,451.70
  5. Step 5: Solve for x
    x = 190,451.70/431.13
  6. Step 6: Final answer
    x = 441.75

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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.