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Finding the Fourth Proportional to 293.28, 405.18 and 283.56

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Solution

The fourth proportional to 293.28, 405.18 and 283.56 is: 391.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.28 : 405.18 = 283.56 : x
  2. Step 2: Convert to fraction form
    293.28/405.18 = 283.56/x
  3. Step 3: Cross multiply
    293.28x = 405.18 × 283.56
  4. Step 4: Simplify right side
    293.28x = 114,892.84
  5. Step 5: Solve for x
    x = 114,892.84/293.28
  6. Step 6: Final answer
    x = 391.75

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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.