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Finding the Fourth Proportional to 290.50, 400.70 and 195.98

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Solution

The fourth proportional to 290.50, 400.70 and 195.98 is: 270.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.50 : 400.70 = 195.98 : x
  2. Step 2: Convert to fraction form
    290.50/400.70 = 195.98/x
  3. Step 3: Cross multiply
    290.50x = 400.70 × 195.98
  4. Step 4: Simplify right side
    290.50x = 78,529.19
  5. Step 5: Solve for x
    x = 78,529.19/290.50
  6. Step 6: Final answer
    x = 270.32

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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.