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Finding the Fourth Proportional to 3,980,967.06, 5,971,454.74 and 989,151.06

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Solution

The fourth proportional to 3,980,967.06, 5,971,454.74 and 989,151.06 is: 1,483,727.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980,967.06 : 5,971,454.74 = 989,151.06 : x
  2. Step 2: Convert to fraction form
    3,980,967.06/5,971,454.74 = 989,151.06/x
  3. Step 3: Cross multiply
    3,980,967.06x = 5,971,454.74 × 989,151.06
  4. Step 4: Simplify right side
    3,980,967.06x = 5,906,670,785,813.03
  5. Step 5: Solve for x
    x = 5,906,670,785,813.03/3,980,967.06
  6. Step 6: Final answer
    x = 1,483,727.62

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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.