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Finding the Fourth Proportional to 264.90, 397.44 and 102.72

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Solution

The fourth proportional to 264.90, 397.44 and 102.72 is: 154.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.90 : 397.44 = 102.72 : x
  2. Step 2: Convert to fraction form
    264.90/397.44 = 102.72/x
  3. Step 3: Cross multiply
    264.90x = 397.44 × 102.72
  4. Step 4: Simplify right side
    264.90x = 40,825.04
  5. Step 5: Solve for x
    x = 40,825.04/264.90
  6. Step 6: Final answer
    x = 154.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.