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Finding the Fourth Proportional to 553.69, 764.13 and 305.03

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Solution

The fourth proportional to 553.69, 764.13 and 305.03 is: 420.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.69 : 764.13 = 305.03 : x
  2. Step 2: Convert to fraction form
    553.69/764.13 = 305.03/x
  3. Step 3: Cross multiply
    553.69x = 764.13 × 305.03
  4. Step 4: Simplify right side
    553.69x = 233,082.57
  5. Step 5: Solve for x
    x = 233,082.57/553.69
  6. Step 6: Final answer
    x = 420.96

Related Problems

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Double scale
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Similar ratio
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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.