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Finding the Fourth Proportional to 280.75, 419.23 and 229.49

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Solution

The fourth proportional to 280.75, 419.23 and 229.49 is: 342.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.75 : 419.23 = 229.49 : x
  2. Step 2: Convert to fraction form
    280.75/419.23 = 229.49/x
  3. Step 3: Cross multiply
    280.75x = 419.23 × 229.49
  4. Step 4: Simplify right side
    280.75x = 96,207.95
  5. Step 5: Solve for x
    x = 96,207.95/280.75
  6. Step 6: Final answer
    x = 342.69

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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.