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Finding the Fourth Proportional to 6,448.98, 9,676.98 and 4,990.98

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Solution

The fourth proportional to 6,448.98, 9,676.98 and 4,990.98 is: 7,489.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,448.98 : 9,676.98 = 4,990.98 : x
  2. Step 2: Convert to fraction form
    6,448.98/9,676.98 = 4,990.98/x
  3. Step 3: Cross multiply
    6,448.98x = 9,676.98 × 4,990.98
  4. Step 4: Simplify right side
    6,448.98x = 48,297,613.64
  5. Step 5: Solve for x
    x = 48,297,613.64/6,448.98
  6. Step 6: Final answer
    x = 7,489.19

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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.