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Finding the Fourth Proportional to 212.96, 293.93 and 143.03

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Solution

The fourth proportional to 212.96, 293.93 and 143.03 is: 197.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.96 : 293.93 = 143.03 : x
  2. Step 2: Convert to fraction form
    212.96/293.93 = 143.03/x
  3. Step 3: Cross multiply
    212.96x = 293.93 × 143.03
  4. Step 4: Simplify right side
    212.96x = 42,041.36
  5. Step 5: Solve for x
    x = 42,041.36/212.96
  6. Step 6: Final answer
    x = 197.41

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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.