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Finding the Fourth Proportional to 351.99, 485.72 and 194.59

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Solution

The fourth proportional to 351.99, 485.72 and 194.59 is: 268.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.99 : 485.72 = 194.59 : x
  2. Step 2: Convert to fraction form
    351.99/485.72 = 194.59/x
  3. Step 3: Cross multiply
    351.99x = 485.72 × 194.59
  4. Step 4: Simplify right side
    351.99x = 94,516.74
  5. Step 5: Solve for x
    x = 94,516.74/351.99
  6. Step 6: Final answer
    x = 268.52

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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.