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Finding the Fourth Proportional to 227.96, 314.50 and 139.40

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Solution

The fourth proportional to 227.96, 314.50 and 139.40 is: 192.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    227.96 : 314.50 = 139.40 : x
  2. Step 2: Convert to fraction form
    227.96/314.50 = 139.40/x
  3. Step 3: Cross multiply
    227.96x = 314.50 × 139.40
  4. Step 4: Simplify right side
    227.96x = 43,840.60
  5. Step 5: Solve for x
    x = 43,840.60/227.96
  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.