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Finding the Fourth Proportional to 835.79, 1,253.58 and 219.50

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Solution

The fourth proportional to 835.79, 1,253.58 and 219.50 is: 329.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    835.79 : 1,253.58 = 219.50 : x
  2. Step 2: Convert to fraction form
    835.79/1,253.58 = 219.50/x
  3. Step 3: Cross multiply
    835.79x = 1,253.58 × 219.50
  4. Step 4: Simplify right side
    835.79x = 275,160.81
  5. Step 5: Solve for x
    x = 275,160.81/835.79
  6. Step 6: Final answer
    x = 329.22

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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.