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Finding the Fourth Proportional to 200.16, 301.37 and 139.70

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Solution

The fourth proportional to 200.16, 301.37 and 139.70 is: 210.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    200.16 : 301.37 = 139.70 : x
  2. Step 2: Convert to fraction form
    200.16/301.37 = 139.70/x
  3. Step 3: Cross multiply
    200.16x = 301.37 × 139.70
  4. Step 4: Simplify right side
    200.16x = 42,101.44
  5. Step 5: Solve for x
    x = 42,101.44/200.16
  6. Step 6: Final answer
    x = 210.34

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.