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Finding the Fourth Proportional to 245.70, 367.89 and 192.40

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Solution

The fourth proportional to 245.70, 367.89 and 192.40 is: 288.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.70 : 367.89 = 192.40 : x
  2. Step 2: Convert to fraction form
    245.70/367.89 = 192.40/x
  3. Step 3: Cross multiply
    245.70x = 367.89 × 192.40
  4. Step 4: Simplify right side
    245.70x = 70,781.84
  5. Step 5: Solve for x
    x = 70,781.84/245.70
  6. Step 6: Final answer
    x = 288.09

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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.