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Finding the Fourth Proportional to 280.62, 387.31 and 162.67

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Solution

The fourth proportional to 280.62, 387.31 and 162.67 is: 224.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.62 : 387.31 = 162.67 : x
  2. Step 2: Convert to fraction form
    280.62/387.31 = 162.67/x
  3. Step 3: Cross multiply
    280.62x = 387.31 × 162.67
  4. Step 4: Simplify right side
    280.62x = 63,003.72
  5. Step 5: Solve for x
    x = 63,003.72/280.62
  6. Step 6: Final answer
    x = 224.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.