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Finding the Fourth Proportional to 275.35, 409.48 and 266.70

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Solution

The fourth proportional to 275.35, 409.48 and 266.70 is: 396.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.35 : 409.48 = 266.70 : x
  2. Step 2: Convert to fraction form
    275.35/409.48 = 266.70/x
  3. Step 3: Cross multiply
    275.35x = 409.48 × 266.70
  4. Step 4: Simplify right side
    275.35x = 109,208.32
  5. Step 5: Solve for x
    x = 109,208.32/275.35
  6. Step 6: Final answer
    x = 396.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.