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Finding the Fourth Proportional to 254.35, 350.40 and 210.61

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Solution

The fourth proportional to 254.35, 350.40 and 210.61 is: 290.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.35 : 350.40 = 210.61 : x
  2. Step 2: Convert to fraction form
    254.35/350.40 = 210.61/x
  3. Step 3: Cross multiply
    254.35x = 350.40 × 210.61
  4. Step 4: Simplify right side
    254.35x = 73,797.74
  5. Step 5: Solve for x
    x = 73,797.74/254.35
  6. Step 6: Final answer
    x = 290.14

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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.