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Finding the Fourth Proportional to 553.24, 764.22 and 378.28

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Solution

The fourth proportional to 553.24, 764.22 and 378.28 is: 522.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.24 : 764.22 = 378.28 : x
  2. Step 2: Convert to fraction form
    553.24/764.22 = 378.28/x
  3. Step 3: Cross multiply
    553.24x = 764.22 × 378.28
  4. Step 4: Simplify right side
    553.24x = 289,089.14
  5. Step 5: Solve for x
    x = 289,089.14/553.24
  6. Step 6: Final answer
    x = 522.54

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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.