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Finding the Fourth Proportional to 850.61, 1,273.41 and 645.99

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Solution

The fourth proportional to 850.61, 1,273.41 and 645.99 is: 967.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.61 : 1,273.41 = 645.99 : x
  2. Step 2: Convert to fraction form
    850.61/1,273.41 = 645.99/x
  3. Step 3: Cross multiply
    850.61x = 1,273.41 × 645.99
  4. Step 4: Simplify right side
    850.61x = 822,610.13
  5. Step 5: Solve for x
    x = 822,610.13/850.61
  6. Step 6: Final answer
    x = 967.09

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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.