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Finding the Fourth Proportional to 265.38, 397.74 and 102.90

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Solution

The fourth proportional to 265.38, 397.74 and 102.90 is: 154.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.38 : 397.74 = 102.90 : x
  2. Step 2: Convert to fraction form
    265.38/397.74 = 102.90/x
  3. Step 3: Cross multiply
    265.38x = 397.74 × 102.90
  4. Step 4: Simplify right side
    265.38x = 40,927.45
  5. Step 5: Solve for x
    x = 40,927.45/265.38
  6. Step 6: Final answer
    x = 154.22

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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.