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Finding the Fourth Proportional to 553.30, 830.10 and 245.22

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Solution

The fourth proportional to 553.30, 830.10 and 245.22 is: 367.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.30 : 830.10 = 245.22 : x
  2. Step 2: Convert to fraction form
    553.30/830.10 = 245.22/x
  3. Step 3: Cross multiply
    553.30x = 830.10 × 245.22
  4. Step 4: Simplify right side
    553.30x = 203,557.12
  5. Step 5: Solve for x
    x = 203,557.12/553.30
  6. Step 6: Final answer
    x = 367.90

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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.