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Finding the Fourth Proportional to 214.28, 295.50 and 139.46

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Solution

The fourth proportional to 214.28, 295.50 and 139.46 is: 192.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.28 : 295.50 = 139.46 : x
  2. Step 2: Convert to fraction form
    214.28/295.50 = 139.46/x
  3. Step 3: Cross multiply
    214.28x = 295.50 × 139.46
  4. Step 4: Simplify right side
    214.28x = 41,209.73
  5. Step 5: Solve for x
    x = 41,209.73/214.28
  6. Step 6: Final answer
    x = 192.32

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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.