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Finding the Fourth Proportional to 850.29, 1,271.98 and 630.78

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Solution

The fourth proportional to 850.29, 1,271.98 and 630.78 is: 943.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.29 : 1,271.98 = 630.78 : x
  2. Step 2: Convert to fraction form
    850.29/1,271.98 = 630.78/x
  3. Step 3: Cross multiply
    850.29x = 1,271.98 × 630.78
  4. Step 4: Simplify right side
    850.29x = 802,339.54
  5. Step 5: Solve for x
    x = 802,339.54/850.29
  6. Step 6: Final answer
    x = 943.61

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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.