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Finding the Fourth Proportional to 245.70, 369.45 and 206.10

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Solution

The fourth proportional to 245.70, 369.45 and 206.10 is: 309.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.70 : 369.45 = 206.10 : x
  2. Step 2: Convert to fraction form
    245.70/369.45 = 206.10/x
  3. Step 3: Cross multiply
    245.70x = 369.45 × 206.10
  4. Step 4: Simplify right side
    245.70x = 76,143.65
  5. Step 5: Solve for x
    x = 76,143.65/245.70
  6. Step 6: Final answer
    x = 309.90

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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.