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Finding the Fourth Proportional to 256,999.22, 354,670.51 and 143,821.97

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Solution

The fourth proportional to 256,999.22, 354,670.51 and 143,821.97 is: 198,480.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,999.22 : 354,670.51 = 143,821.97 : x
  2. Step 2: Convert to fraction form
    256,999.22/354,670.51 = 143,821.97/x
  3. Step 3: Cross multiply
    256,999.22x = 354,670.51 × 143,821.97
  4. Step 4: Simplify right side
    256,999.22x = 51,009,411,449.10
  5. Step 5: Solve for x
    x = 51,009,411,449.10/256,999.22
  6. Step 6: Final answer
    x = 198,480.80

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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.