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Finding the Fourth Proportional to 850.92, 1,276.79 and 418.02

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Solution

The fourth proportional to 850.92, 1,276.79 and 418.02 is: 627.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.92 : 1,276.79 = 418.02 : x
  2. Step 2: Convert to fraction form
    850.92/1,276.79 = 418.02/x
  3. Step 3: Cross multiply
    850.92x = 1,276.79 × 418.02
  4. Step 4: Simplify right side
    850.92x = 533,721.67
  5. Step 5: Solve for x
    x = 533,721.67/850.92
  6. Step 6: Final answer
    x = 627.23

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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.