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Finding the Fourth Proportional to 553.79, 830.19 and 228.95

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Solution

The fourth proportional to 553.79, 830.19 and 228.95 is: 343.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.79 : 830.19 = 228.95 : x
  2. Step 2: Convert to fraction form
    553.79/830.19 = 228.95/x
  3. Step 3: Cross multiply
    553.79x = 830.19 × 228.95
  4. Step 4: Simplify right side
    553.79x = 190,072.00
  5. Step 5: Solve for x
    x = 190,072.00/553.79
  6. Step 6: Final answer
    x = 343.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.