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Finding the Fourth Proportional to 279.36, 384.49 and 271.72

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Solution

The fourth proportional to 279.36, 384.49 and 271.72 is: 373.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.36 : 384.49 = 271.72 : x
  2. Step 2: Convert to fraction form
    279.36/384.49 = 271.72/x
  3. Step 3: Cross multiply
    279.36x = 384.49 × 271.72
  4. Step 4: Simplify right side
    279.36x = 104,474.44
  5. Step 5: Solve for x
    x = 104,474.44/279.36
  6. Step 6: Final answer
    x = 373.98

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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.