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Finding the Fourth Proportional to 305,687.80, 458,531.70 and 193,713.40

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Solution

The fourth proportional to 305,687.80, 458,531.70 and 193,713.40 is: 290,570.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,687.80 : 458,531.70 = 193,713.40 : x
  2. Step 2: Convert to fraction form
    305,687.80/458,531.70 = 193,713.40/x
  3. Step 3: Cross multiply
    305,687.80x = 458,531.70 × 193,713.40
  4. Step 4: Simplify right side
    305,687.80x = 88,823,734,614.78
  5. Step 5: Solve for x
    x = 88,823,734,614.78/305,687.80
  6. Step 6: Final answer
    x = 290,570.10

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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.