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Finding the Fourth Proportional to 3,980,982.06, 5,971,477.26 and 989,166.06

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Solution

The fourth proportional to 3,980,982.06, 5,971,477.26 and 989,166.06 is: 1,483,750.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980,982.06 : 5,971,477.26 = 989,166.06 : x
  2. Step 2: Convert to fraction form
    3,980,982.06/5,971,477.26 = 989,166.06/x
  3. Step 3: Cross multiply
    3,980,982.06x = 5,971,477.26 × 989,166.06
  4. Step 4: Simplify right side
    3,980,982.06x = 5,906,782,633,653.80
  5. Step 5: Solve for x
    x = 5,906,782,633,653.80/3,980,982.06
  6. Step 6: Final answer
    x = 1,483,750.13

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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.