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Finding the Fourth Proportional to 256,796.70, 385,083.47 and 121,899.43

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Solution

The fourth proportional to 256,796.70, 385,083.47 and 121,899.43 is: 182,796.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,796.70 : 385,083.47 = 121,899.43 : x
  2. Step 2: Convert to fraction form
    256,796.70/385,083.47 = 121,899.43/x
  3. Step 3: Cross multiply
    256,796.70x = 385,083.47 × 121,899.43
  4. Step 4: Simplify right side
    256,796.70x = 46,941,454,885.93
  5. Step 5: Solve for x
    x = 46,941,454,885.93/256,796.70
  6. Step 6: Final answer
    x = 182,796.18

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1.5x scale

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.