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Finding the Fourth Proportional to 209.58, 313.56 and 174.93

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Solution

The fourth proportional to 209.58, 313.56 and 174.93 is: 261.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.58 : 313.56 = 174.93 : x
  2. Step 2: Convert to fraction form
    209.58/313.56 = 174.93/x
  3. Step 3: Cross multiply
    209.58x = 313.56 × 174.93
  4. Step 4: Simplify right side
    209.58x = 54,851.05
  5. Step 5: Solve for x
    x = 54,851.05/209.58
  6. Step 6: Final answer
    x = 261.72

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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.