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Finding the Fourth Proportional to 851.09, 1,274.57 and 484.76

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Solution

The fourth proportional to 851.09, 1,274.57 and 484.76 is: 725.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.09 : 1,274.57 = 484.76 : x
  2. Step 2: Convert to fraction form
    851.09/1,274.57 = 484.76/x
  3. Step 3: Cross multiply
    851.09x = 1,274.57 × 484.76
  4. Step 4: Simplify right side
    851.09x = 617,851.76
  5. Step 5: Solve for x
    x = 617,851.76/851.09
  6. Step 6: Final answer
    x = 725.96

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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.