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Finding the Fourth Proportional to 833.78, 1,250.65 and 217.47

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Solution

The fourth proportional to 833.78, 1,250.65 and 217.47 is: 326.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.78 : 1,250.65 = 217.47 : x
  2. Step 2: Convert to fraction form
    833.78/1,250.65 = 217.47/x
  3. Step 3: Cross multiply
    833.78x = 1,250.65 × 217.47
  4. Step 4: Simplify right side
    833.78x = 271,983.82
  5. Step 5: Solve for x
    x = 271,983.82/833.78
  6. Step 6: Final answer
    x = 326.20

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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.