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Finding the Fourth Proportional to 553.40, 830.12 and 228.58

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Solution

The fourth proportional to 553.40, 830.12 and 228.58 is: 342.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.40 : 830.12 = 228.58 : x
  2. Step 2: Convert to fraction form
    553.40/830.12 = 228.58/x
  3. Step 3: Cross multiply
    553.40x = 830.12 × 228.58
  4. Step 4: Simplify right side
    553.40x = 189,748.83
  5. Step 5: Solve for x
    x = 189,748.83/553.40
  6. Step 6: Final answer
    x = 342.88

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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.