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Finding the Fourth Proportional to 310.25, 427.66 and 260.44

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Solution

The fourth proportional to 310.25, 427.66 and 260.44 is: 358.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.25 : 427.66 = 260.44 : x
  2. Step 2: Convert to fraction form
    310.25/427.66 = 260.44/x
  3. Step 3: Cross multiply
    310.25x = 427.66 × 260.44
  4. Step 4: Simplify right side
    310.25x = 111,378.05
  5. Step 5: Solve for x
    x = 111,378.05/310.25
  6. Step 6: Final answer
    x = 358.99

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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.