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Finding the Fourth Proportional to 254.58, 351.12 and 210.84

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Solution

The fourth proportional to 254.58, 351.12 and 210.84 is: 290.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.58 : 351.12 = 210.84 : x
  2. Step 2: Convert to fraction form
    254.58/351.12 = 210.84/x
  3. Step 3: Cross multiply
    254.58x = 351.12 × 210.84
  4. Step 4: Simplify right side
    254.58x = 74,030.14
  5. Step 5: Solve for x
    x = 74,030.14/254.58
  6. Step 6: Final answer
    x = 290.79

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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.