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Finding the Fourth Proportional to 553.64, 764.03 and 304.95

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Solution

The fourth proportional to 553.64, 764.03 and 304.95 is: 420.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.64 : 764.03 = 304.95 : x
  2. Step 2: Convert to fraction form
    553.64/764.03 = 304.95/x
  3. Step 3: Cross multiply
    553.64x = 764.03 × 304.95
  4. Step 4: Simplify right side
    553.64x = 232,989.42
  5. Step 5: Solve for x
    x = 232,989.42/553.64
  6. Step 6: Final answer
    x = 420.84

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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.