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Finding the Fourth Proportional to 280.15, 418.33 and 228.89

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Solution

The fourth proportional to 280.15, 418.33 and 228.89 is: 341.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.15 : 418.33 = 228.89 : x
  2. Step 2: Convert to fraction form
    280.15/418.33 = 228.89/x
  3. Step 3: Cross multiply
    280.15x = 418.33 × 228.89
  4. Step 4: Simplify right side
    280.15x = 95,750.89
  5. Step 5: Solve for x
    x = 95,750.89/280.15
  6. Step 6: Final answer
    x = 341.79

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.