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Finding the Fourth Proportional to 209.00, 312.84 and 170.15

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Solution

The fourth proportional to 209.00, 312.84 and 170.15 is: 254.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.00 : 312.84 = 170.15 : x
  2. Step 2: Convert to fraction form
    209.00/312.84 = 170.15/x
  3. Step 3: Cross multiply
    209.00x = 312.84 × 170.15
  4. Step 4: Simplify right side
    209.00x = 53,230.51
  5. Step 5: Solve for x
    x = 53,230.51/209.00
  6. Step 6: Final answer
    x = 254.69

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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.