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Finding the Fourth Proportional to 254.96, 349.21 and 240.20

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Solution

The fourth proportional to 254.96, 349.21 and 240.20 is: 328.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.96 : 349.21 = 240.20 : x
  2. Step 2: Convert to fraction form
    254.96/349.21 = 240.20/x
  3. Step 3: Cross multiply
    254.96x = 349.21 × 240.20
  4. Step 4: Simplify right side
    254.96x = 83,880.24
  5. Step 5: Solve for x
    x = 83,880.24/254.96
  6. Step 6: Final answer
    x = 328.99

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.