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Finding the Fourth Proportional to 293.75, 440.44 and 139.72

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Solution

The fourth proportional to 293.75, 440.44 and 139.72 is: 209.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.75 : 440.44 = 139.72 : x
  2. Step 2: Convert to fraction form
    293.75/440.44 = 139.72/x
  3. Step 3: Cross multiply
    293.75x = 440.44 × 139.72
  4. Step 4: Simplify right side
    293.75x = 61,538.28
  5. Step 5: Solve for x
    x = 61,538.28/293.75
  6. Step 6: Final answer
    x = 209.49

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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.