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Finding the Fourth Proportional to 278,855.33, 384,826.05 and 151,539.13

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Solution

The fourth proportional to 278,855.33, 384,826.05 and 151,539.13 is: 209,127.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,855.33 : 384,826.05 = 151,539.13 : x
  2. Step 2: Convert to fraction form
    278,855.33/384,826.05 = 151,539.13/x
  3. Step 3: Cross multiply
    278,855.33x = 384,826.05 × 151,539.13
  4. Step 4: Simplify right side
    278,855.33x = 58,316,203,856.27
  5. Step 5: Solve for x
    x = 58,316,203,856.27/278,855.33
  6. Step 6: Final answer
    x = 209,127.09

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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.