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Finding the Fourth Proportional to 901.21, 1,350.96 and 353.21

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Solution

The fourth proportional to 901.21, 1,350.96 and 353.21 is: 529.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.21 : 1,350.96 = 353.21 : x
  2. Step 2: Convert to fraction form
    901.21/1,350.96 = 353.21/x
  3. Step 3: Cross multiply
    901.21x = 1,350.96 × 353.21
  4. Step 4: Simplify right side
    901.21x = 477,170.82
  5. Step 5: Solve for x
    x = 477,170.82/901.21
  6. Step 6: Final answer
    x = 529.48

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Double scale
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Similar ratio
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1.5x scale

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.