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Finding the Fourth Proportional to 851.60, 1,277.22 and 274.16

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Solution

The fourth proportional to 851.60, 1,277.22 and 274.16 is: 411.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.60 : 1,277.22 = 274.16 : x
  2. Step 2: Convert to fraction form
    851.60/1,277.22 = 274.16/x
  3. Step 3: Cross multiply
    851.60x = 1,277.22 × 274.16
  4. Step 4: Simplify right side
    851.60x = 350,162.64
  5. Step 5: Solve for x
    x = 350,162.64/851.60
  6. Step 6: Final answer
    x = 411.18

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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.