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Finding the Fourth Proportional to 851.37, 1,277.15 and 303.68

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Solution

The fourth proportional to 851.37, 1,277.15 and 303.68 is: 455.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.37 : 1,277.15 = 303.68 : x
  2. Step 2: Convert to fraction form
    851.37/1,277.15 = 303.68/x
  3. Step 3: Cross multiply
    851.37x = 1,277.15 × 303.68
  4. Step 4: Simplify right side
    851.37x = 387,844.91
  5. Step 5: Solve for x
    x = 387,844.91/851.37
  6. Step 6: Final answer
    x = 455.55

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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.