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Finding the Fourth Proportional to 281,109.64, 387,940.44 and 153,785.23

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Solution

The fourth proportional to 281,109.64, 387,940.44 and 153,785.23 is: 212,228.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,109.64 : 387,940.44 = 153,785.23 : x
  2. Step 2: Convert to fraction form
    281,109.64/387,940.44 = 153,785.23/x
  3. Step 3: Cross multiply
    281,109.64x = 387,940.44 × 153,785.23
  4. Step 4: Simplify right side
    281,109.64x = 59,659,510,715.67
  5. Step 5: Solve for x
    x = 59,659,510,715.67/281,109.64
  6. Step 6: Final answer
    x = 212,228.62

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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.