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Finding the Fourth Proportional to 553.86, 764.66 and 492.35

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Solution

The fourth proportional to 553.86, 764.66 and 492.35 is: 679.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.86 : 764.66 = 492.35 : x
  2. Step 2: Convert to fraction form
    553.86/764.66 = 492.35/x
  3. Step 3: Cross multiply
    553.86x = 764.66 × 492.35
  4. Step 4: Simplify right side
    553.86x = 376,477.89
  5. Step 5: Solve for x
    x = 376,477.89/553.86
  6. Step 6: Final answer
    x = 679.73

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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.