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Finding the Fourth Proportional to 381,528.63, 572,160.78 and 191,915.73

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Solution

The fourth proportional to 381,528.63, 572,160.78 and 191,915.73 is: 287,807.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,528.63 : 572,160.78 = 191,915.73 : x
  2. Step 2: Convert to fraction form
    381,528.63/572,160.78 = 191,915.73/x
  3. Step 3: Cross multiply
    381,528.63x = 572,160.78 × 191,915.73
  4. Step 4: Simplify right side
    381,528.63x = 109,806,653,771.07
  5. Step 5: Solve for x
    x = 109,806,653,771.07/381,528.63
  6. Step 6: Final answer
    x = 287,807.11

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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.