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Finding the Fourth Proportional to 282.79, 389.13 and 274.33

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Solution

The fourth proportional to 282.79, 389.13 and 274.33 is: 377.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.79 : 389.13 = 274.33 : x
  2. Step 2: Convert to fraction form
    282.79/389.13 = 274.33/x
  3. Step 3: Cross multiply
    282.79x = 389.13 × 274.33
  4. Step 4: Simplify right side
    282.79x = 106,749.49
  5. Step 5: Solve for x
    x = 106,749.49/282.79
  6. Step 6: Final answer
    x = 377.49

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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.