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Finding the Fourth Proportional to 851.62, 1,276.52 and 440.65

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Solution

The fourth proportional to 851.62, 1,276.52 and 440.65 is: 660.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.62 : 1,276.52 = 440.65 : x
  2. Step 2: Convert to fraction form
    851.62/1,276.52 = 440.65/x
  3. Step 3: Cross multiply
    851.62x = 1,276.52 × 440.65
  4. Step 4: Simplify right side
    851.62x = 562,498.54
  5. Step 5: Solve for x
    x = 562,498.54/851.62
  6. Step 6: Final answer
    x = 660.50

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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.