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Finding the Fourth Proportional to 4,986.63, 7,479.94 and 1,338.63

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Solution

The fourth proportional to 4,986.63, 7,479.94 and 1,338.63 is: 2,007.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,986.63 : 7,479.94 = 1,338.63 : x
  2. Step 2: Convert to fraction form
    4,986.63/7,479.94 = 1,338.63/x
  3. Step 3: Cross multiply
    4,986.63x = 7,479.94 × 1,338.63
  4. Step 4: Simplify right side
    4,986.63x = 10,012,831.34
  5. Step 5: Solve for x
    x = 10,012,831.34/4,986.63
  6. Step 6: Final answer
    x = 2,007.94

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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.