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Finding the Fourth Proportional to 642,381.74, 963,573.31 and 193,102.56

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Solution

The fourth proportional to 642,381.74, 963,573.31 and 193,102.56 is: 289,654.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,381.74 : 963,573.31 = 193,102.56 : x
  2. Step 2: Convert to fraction form
    642,381.74/963,573.31 = 193,102.56/x
  3. Step 3: Cross multiply
    642,381.74x = 963,573.31 × 193,102.56
  4. Step 4: Simplify right side
    642,381.74x = 186,068,473,150.05
  5. Step 5: Solve for x
    x = 186,068,473,150.05/642,381.74
  6. Step 6: Final answer
    x = 289,654.05

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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.