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Finding the Fourth Proportional to 851.35, 1,276.73 and 303.45

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Solution

The fourth proportional to 851.35, 1,276.73 and 303.45 is: 455.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.35 : 1,276.73 = 303.45 : x
  2. Step 2: Convert to fraction form
    851.35/1,276.73 = 303.45/x
  3. Step 3: Cross multiply
    851.35x = 1,276.73 × 303.45
  4. Step 4: Simplify right side
    851.35x = 387,423.72
  5. Step 5: Solve for x
    x = 387,423.72/851.35
  6. Step 6: Final answer
    x = 455.07

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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.