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Finding the Fourth Proportional to 851.99, 1,277.07 and 440.71

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Solution

The fourth proportional to 851.99, 1,277.07 and 440.71 is: 660.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    851.99 : 1,277.07 = 440.71 : x
  2. Step 2: Convert to fraction form
    851.99/1,277.07 = 440.71/x
  3. Step 3: Cross multiply
    851.99x = 1,277.07 × 440.71
  4. Step 4: Simplify right side
    851.99x = 562,822.37
  5. Step 5: Solve for x
    x = 562,822.37/851.99
  6. Step 6: Final answer
    x = 660.60

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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.