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Finding the Fourth Proportional to 351.93, 485.67 and 212.00

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Solution

The fourth proportional to 351.93, 485.67 and 212.00 is: 292.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.93 : 485.67 = 212.00 : x
  2. Step 2: Convert to fraction form
    351.93/485.67 = 212.00/x
  3. Step 3: Cross multiply
    351.93x = 485.67 × 212.00
  4. Step 4: Simplify right side
    351.93x = 102,959.61
  5. Step 5: Solve for x
    x = 102,959.61/351.93
  6. Step 6: Final answer
    x = 292.56

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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.