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Finding the Fourth Proportional to 276,187.96, 381,191.70 and 172,870.07

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Solution

The fourth proportional to 276,187.96, 381,191.70 and 172,870.07 is: 238,593.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,187.96 : 381,191.70 = 172,870.07 : x
  2. Step 2: Convert to fraction form
    276,187.96/381,191.70 = 172,870.07/x
  3. Step 3: Cross multiply
    276,187.96x = 381,191.70 × 172,870.07
  4. Step 4: Simplify right side
    276,187.96x = 65,896,633,956.46
  5. Step 5: Solve for x
    x = 65,896,633,956.46/276,187.96
  6. Step 6: Final answer
    x = 238,593.43

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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.