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Finding the Fourth Proportional to 640,448.24, 883,940.46 and 422,273.12

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Solution

The fourth proportional to 640,448.24, 883,940.46 and 422,273.12 is: 582,817.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,448.24 : 883,940.46 = 422,273.12 : x
  2. Step 2: Convert to fraction form
    640,448.24/883,940.46 = 422,273.12/x
  3. Step 3: Cross multiply
    640,448.24x = 883,940.46 × 422,273.12
  4. Step 4: Simplify right side
    640,448.24x = 373,264,295,938.44
  5. Step 5: Solve for x
    x = 373,264,295,938.44/640,448.24
  6. Step 6: Final answer
    x = 582,817.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.