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Finding the Fourth Proportional to 553.77, 764.28 and 357.85

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Solution

The fourth proportional to 553.77, 764.28 and 357.85 is: 493.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.77 : 764.28 = 357.85 : x
  2. Step 2: Convert to fraction form
    553.77/764.28 = 357.85/x
  3. Step 3: Cross multiply
    553.77x = 764.28 × 357.85
  4. Step 4: Simplify right side
    553.77x = 273,491.99
  5. Step 5: Solve for x
    x = 273,491.99/553.77
  6. Step 6: Final answer
    x = 493.88

Related Problems

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Double scale
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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.