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Finding the Fourth Proportional to 298.75, 412.18 and 188.34

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Solution

The fourth proportional to 298.75, 412.18 and 188.34 is: 259.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    298.75 : 412.18 = 188.34 : x
  2. Step 2: Convert to fraction form
    298.75/412.18 = 188.34/x
  3. Step 3: Cross multiply
    298.75x = 412.18 × 188.34
  4. Step 4: Simplify right side
    298.75x = 77,629.98
  5. Step 5: Solve for x
    x = 77,629.98/298.75
  6. Step 6: Final answer
    x = 259.85

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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.