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Finding the Fourth Proportional to 835.51, 1,253.31 and 219.22

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Solution

The fourth proportional to 835.51, 1,253.31 and 219.22 is: 328.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.51 : 1,253.31 = 219.22 : x
  2. Step 2: Convert to fraction form
    835.51/1,253.31 = 219.22/x
  3. Step 3: Cross multiply
    835.51x = 1,253.31 × 219.22
  4. Step 4: Simplify right side
    835.51x = 274,750.62
  5. Step 5: Solve for x
    x = 274,750.62/835.51
  6. Step 6: Final answer
    x = 328.84

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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.