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Finding the Fourth Proportional to 280.94, 387.63 and 162.88

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Solution

The fourth proportional to 280.94, 387.63 and 162.88 is: 224.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.94 : 387.63 = 162.88 : x
  2. Step 2: Convert to fraction form
    280.94/387.63 = 162.88/x
  3. Step 3: Cross multiply
    280.94x = 387.63 × 162.88
  4. Step 4: Simplify right side
    280.94x = 63,136.21
  5. Step 5: Solve for x
    x = 63,136.21/280.94
  6. Step 6: Final answer
    x = 224.74

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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.