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Finding the Fourth Proportional to 296.28, 409.14 and 280.94

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Solution

The fourth proportional to 296.28, 409.14 and 280.94 is: 387.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    296.28 : 409.14 = 280.94 : x
  2. Step 2: Convert to fraction form
    296.28/409.14 = 280.94/x
  3. Step 3: Cross multiply
    296.28x = 409.14 × 280.94
  4. Step 4: Simplify right side
    296.28x = 114,941.75
  5. Step 5: Solve for x
    x = 114,941.75/296.28
  6. Step 6: Final answer
    x = 387.95

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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.