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Finding the Fourth Proportional to 400.70, 600.08 and 205.18

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Solution

The fourth proportional to 400.70, 600.08 and 205.18 is: 307.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.70 : 600.08 = 205.18 : x
  2. Step 2: Convert to fraction form
    400.70/600.08 = 205.18/x
  3. Step 3: Cross multiply
    400.70x = 600.08 × 205.18
  4. Step 4: Simplify right side
    400.70x = 123,123.90
  5. Step 5: Solve for x
    x = 123,123.90/400.70
  6. Step 6: Final answer
    x = 307.28

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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.