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Finding the Fourth Proportional to 3,086.42, 4,629.64 and 777.94

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Solution

The fourth proportional to 3,086.42, 4,629.64 and 777.94 is: 1,166.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,086.42 : 4,629.64 = 777.94 : x
  2. Step 2: Convert to fraction form
    3,086.42/4,629.64 = 777.94/x
  3. Step 3: Cross multiply
    3,086.42x = 4,629.64 × 777.94
  4. Step 4: Simplify right side
    3,086.42x = 3,601,582.14
  5. Step 5: Solve for x
    x = 3,601,582.14/3,086.42
  6. Step 6: Final answer
    x = 1,166.91

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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.