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Finding the Fourth Proportional to 280.60, 387.74 and 202.84

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Solution

The fourth proportional to 280.60, 387.74 and 202.84 is: 280.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.60 : 387.74 = 202.84 : x
  2. Step 2: Convert to fraction form
    280.60/387.74 = 202.84/x
  3. Step 3: Cross multiply
    280.60x = 387.74 × 202.84
  4. Step 4: Simplify right side
    280.60x = 78,649.18
  5. Step 5: Solve for x
    x = 78,649.18/280.60
  6. Step 6: Final answer
    x = 280.29

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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.