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Finding the Fourth Proportional to 850.77, 1,272.15 and 606.54

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Solution

The fourth proportional to 850.77, 1,272.15 and 606.54 is: 906.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.77 : 1,272.15 = 606.54 : x
  2. Step 2: Convert to fraction form
    850.77/1,272.15 = 606.54/x
  3. Step 3: Cross multiply
    850.77x = 1,272.15 × 606.54
  4. Step 4: Simplify right side
    850.77x = 771,609.86
  5. Step 5: Solve for x
    x = 771,609.86/850.77
  6. Step 6: Final answer
    x = 906.95

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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.