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Finding the Fourth Proportional to 279.63, 384.58 and 224.28

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Solution

The fourth proportional to 279.63, 384.58 and 224.28 is: 308.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.63 : 384.58 = 224.28 : x
  2. Step 2: Convert to fraction form
    279.63/384.58 = 224.28/x
  3. Step 3: Cross multiply
    279.63x = 384.58 × 224.28
  4. Step 4: Simplify right side
    279.63x = 86,250.56
  5. Step 5: Solve for x
    x = 86,250.56/279.63
  6. Step 6: Final answer
    x = 308.45

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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.