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Finding the Fourth Proportional to 280,883.96, 387,619.80 and 153,559.55

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Solution

The fourth proportional to 280,883.96, 387,619.80 and 153,559.55 is: 211,912.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,883.96 : 387,619.80 = 153,559.55 : x
  2. Step 2: Convert to fraction form
    280,883.96/387,619.80 = 153,559.55/x
  3. Step 3: Cross multiply
    280,883.96x = 387,619.80 × 153,559.55
  4. Step 4: Simplify right side
    280,883.96x = 59,522,722,452.29
  5. Step 5: Solve for x
    x = 59,522,722,452.29/280,883.96
  6. Step 6: Final answer
    x = 211,912.15

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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.