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Finding the Fourth Proportional to 279,008.74, 384,381.21 and 193,978.18

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Solution

The fourth proportional to 279,008.74, 384,381.21 and 193,978.18 is: 267,237.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,008.74 : 384,381.21 = 193,978.18 : x
  2. Step 2: Convert to fraction form
    279,008.74/384,381.21 = 193,978.18/x
  3. Step 3: Cross multiply
    279,008.74x = 384,381.21 × 193,978.18
  4. Step 4: Simplify right side
    279,008.74x = 74,561,567,542.00
  5. Step 5: Solve for x
    x = 74,561,567,542.00/279,008.74
  6. Step 6: Final answer
    x = 267,237.39

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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.