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Finding the Fourth Proportional to 278,885.60, 384,865.11 and 151,561.19

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Solution

The fourth proportional to 278,885.60, 384,865.11 and 151,561.19 is: 209,156.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,885.60 : 384,865.11 = 151,561.19 : x
  2. Step 2: Convert to fraction form
    278,885.60/384,865.11 = 151,561.19/x
  3. Step 3: Cross multiply
    278,885.60x = 384,865.11 × 151,561.19
  4. Step 4: Simplify right side
    278,885.60x = 58,330,614,061.08
  5. Step 5: Solve for x
    x = 58,330,614,061.08/278,885.60
  6. Step 6: Final answer
    x = 209,156.06

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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.