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Finding the Fourth Proportional to 4,990.86, 7,484.12 and 2,650.35

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Solution

The fourth proportional to 4,990.86, 7,484.12 and 2,650.35 is: 3,974.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,990.86 : 7,484.12 = 2,650.35 : x
  2. Step 2: Convert to fraction form
    4,990.86/7,484.12 = 2,650.35/x
  3. Step 3: Cross multiply
    4,990.86x = 7,484.12 × 2,650.35
  4. Step 4: Simplify right side
    4,990.86x = 19,835,524.19
  5. Step 5: Solve for x
    x = 19,835,524.19/4,990.86
  6. Step 6: Final answer
    x = 3,974.37

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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.