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Finding the Fourth Proportional to 1,989,941.92, 2,984,621.26 and 978,792.48

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Solution

The fourth proportional to 1,989,941.92, 2,984,621.26 and 978,792.48 is: 1,468,045.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989,941.92 : 2,984,621.26 = 978,792.48 : x
  2. Step 2: Convert to fraction form
    1,989,941.92/2,984,621.26 = 978,792.48/x
  3. Step 3: Cross multiply
    1,989,941.92x = 2,984,621.26 × 978,792.48
  4. Step 4: Simplify right side
    1,989,941.92x = 2,921,324,844,936.12
  5. Step 5: Solve for x
    x = 2,921,324,844,936.12/1,989,941.92
  6. Step 6: Final answer
    x = 1,468,045.28

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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.