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Finding the Fourth Proportional to 293.43, 439.95 and 139.15

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Solution

The fourth proportional to 293.43, 439.95 and 139.15 is: 208.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.43 : 439.95 = 139.15 : x
  2. Step 2: Convert to fraction form
    293.43/439.95 = 139.15/x
  3. Step 3: Cross multiply
    293.43x = 439.95 × 139.15
  4. Step 4: Simplify right side
    293.43x = 61,219.04
  5. Step 5: Solve for x
    x = 61,219.04/293.43
  6. Step 6: Final answer
    x = 208.63

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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.