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Finding the Fourth Proportional to 293.64, 405.99 and 280.50

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Solution

The fourth proportional to 293.64, 405.99 and 280.50 is: 387.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.64 : 405.99 = 280.50 : x
  2. Step 2: Convert to fraction form
    293.64/405.99 = 280.50/x
  3. Step 3: Cross multiply
    293.64x = 405.99 × 280.50
  4. Step 4: Simplify right side
    293.64x = 113,880.20
  5. Step 5: Solve for x
    x = 113,880.20/293.64
  6. Step 6: Final answer
    x = 387.82

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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.