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Finding the Fourth Proportional to 553.56, 764.28 and 357.36

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Solution

The fourth proportional to 553.56, 764.28 and 357.36 is: 493.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.56 : 764.28 = 357.36 : x
  2. Step 2: Convert to fraction form
    553.56/764.28 = 357.36/x
  3. Step 3: Cross multiply
    553.56x = 764.28 × 357.36
  4. Step 4: Simplify right side
    553.56x = 273,123.10
  5. Step 5: Solve for x
    x = 273,123.10/553.56
  6. Step 6: Final answer
    x = 493.39

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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.