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Finding the Fourth Proportional to 265.55, 398.75 and 251.82

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Solution

The fourth proportional to 265.55, 398.75 and 251.82 is: 378.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.55 : 398.75 = 251.82 : x
  2. Step 2: Convert to fraction form
    265.55/398.75 = 251.82/x
  3. Step 3: Cross multiply
    265.55x = 398.75 × 251.82
  4. Step 4: Simplify right side
    265.55x = 100,411.97
  5. Step 5: Solve for x
    x = 100,411.97/265.55
  6. Step 6: Final answer
    x = 378.14

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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.