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Finding the Fourth Proportional to 851.33, 1,276.55 and 303.43

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Solution

The fourth proportional to 851.33, 1,276.55 and 303.43 is: 454.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.33 : 1,276.55 = 303.43 : x
  2. Step 2: Convert to fraction form
    851.33/1,276.55 = 303.43/x
  3. Step 3: Cross multiply
    851.33x = 1,276.55 × 303.43
  4. Step 4: Simplify right side
    851.33x = 387,338.86
  5. Step 5: Solve for x
    x = 387,338.86/851.33
  6. Step 6: Final answer
    x = 454.98

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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.