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Finding the Fourth Proportional to 561.75, 842.49 and 191.51

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Solution

The fourth proportional to 561.75, 842.49 and 191.51 is: 287.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.75 : 842.49 = 191.51 : x
  2. Step 2: Convert to fraction form
    561.75/842.49 = 191.51/x
  3. Step 3: Cross multiply
    561.75x = 842.49 × 191.51
  4. Step 4: Simplify right side
    561.75x = 161,347.37
  5. Step 5: Solve for x
    x = 161,347.37/561.75
  6. Step 6: Final answer
    x = 287.22

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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.