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Finding the Fourth Proportional to 833.79, 1,250.58 and 217.50

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Solution

The fourth proportional to 833.79, 1,250.58 and 217.50 is: 326.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.79 : 1,250.58 = 217.50 : x
  2. Step 2: Convert to fraction form
    833.79/1,250.58 = 217.50/x
  3. Step 3: Cross multiply
    833.79x = 1,250.58 × 217.50
  4. Step 4: Simplify right side
    833.79x = 271,997.28
  5. Step 5: Solve for x
    x = 271,997.28/833.79
  6. Step 6: Final answer
    x = 326.22

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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.