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Finding the Fourth Proportional to 293.76, 439.70 and 212.22

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Solution

The fourth proportional to 293.76, 439.70 and 212.22 is: 317.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    293.76 : 439.70 = 212.22 : x
  2. Step 2: Convert to fraction form
    293.76/439.70 = 212.22/x
  3. Step 3: Cross multiply
    293.76x = 439.70 × 212.22
  4. Step 4: Simplify right side
    293.76x = 93,312.07
  5. Step 5: Solve for x
    x = 93,312.07/293.76
  6. Step 6: Final answer
    x = 317.65

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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.