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Finding the Fourth Proportional to 553.98, 764.61 and 317.97

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Solution

The fourth proportional to 553.98, 764.61 and 317.97 is: 438.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.98 : 764.61 = 317.97 : x
  2. Step 2: Convert to fraction form
    553.98/764.61 = 317.97/x
  3. Step 3: Cross multiply
    553.98x = 764.61 × 317.97
  4. Step 4: Simplify right side
    553.98x = 243,123.04
  5. Step 5: Solve for x
    x = 243,123.04/553.98
  6. Step 6: Final answer
    x = 438.87

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.