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Finding the Fourth Proportional to 901.73, 1,353.21 and 439.63

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Solution

The fourth proportional to 901.73, 1,353.21 and 439.63 is: 659.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.73 : 1,353.21 = 439.63 : x
  2. Step 2: Convert to fraction form
    901.73/1,353.21 = 439.63/x
  3. Step 3: Cross multiply
    901.73x = 1,353.21 × 439.63
  4. Step 4: Simplify right side
    901.73x = 594,906.68
  5. Step 5: Solve for x
    x = 594,906.68/901.73
  6. Step 6: Final answer
    x = 659.74

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.