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Finding the Fourth Proportional to 553.43, 830.15 and 163.49

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Solution

The fourth proportional to 553.43, 830.15 and 163.49 is: 245.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.43 : 830.15 = 163.49 : x
  2. Step 2: Convert to fraction form
    553.43/830.15 = 163.49/x
  3. Step 3: Cross multiply
    553.43x = 830.15 × 163.49
  4. Step 4: Simplify right side
    553.43x = 135,723.87
  5. Step 5: Solve for x
    x = 135,723.87/553.43
  6. Step 6: Final answer
    x = 245.24

Related Problems

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Half scale
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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.