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Finding the Fourth Proportional to 4,986.86, 7,479.69 and 2,651.63

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Solution

The fourth proportional to 4,986.86, 7,479.69 and 2,651.63 is: 3,977.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,986.86 : 7,479.69 = 2,651.63 : x
  2. Step 2: Convert to fraction form
    4,986.86/7,479.69 = 2,651.63/x
  3. Step 3: Cross multiply
    4,986.86x = 7,479.69 × 2,651.63
  4. Step 4: Simplify right side
    4,986.86x = 19,833,370.39
  5. Step 5: Solve for x
    x = 19,833,370.39/4,986.86
  6. Step 6: Final answer
    x = 3,977.13

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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.