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Finding the Fourth Proportional to 293.17, 439.89 and 139.15

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Solution

The fourth proportional to 293.17, 439.89 and 139.15 is: 208.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.17 : 439.89 = 139.15 : x
  2. Step 2: Convert to fraction form
    293.17/439.89 = 139.15/x
  3. Step 3: Cross multiply
    293.17x = 439.89 × 139.15
  4. Step 4: Simplify right side
    293.17x = 61,210.69
  5. Step 5: Solve for x
    x = 61,210.69/293.17
  6. Step 6: Final answer
    x = 208.79

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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.