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Finding the Fourth Proportional to 279,137.16, 385,205.04 and 151,809.84

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Solution

The fourth proportional to 279,137.16, 385,205.04 and 151,809.84 is: 209,495.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,137.16 : 385,205.04 = 151,809.84 : x
  2. Step 2: Convert to fraction form
    279,137.16/385,205.04 = 151,809.84/x
  3. Step 3: Cross multiply
    279,137.16x = 385,205.04 × 151,809.84
  4. Step 4: Simplify right side
    279,137.16x = 58,477,915,489.59
  5. Step 5: Solve for x
    x = 58,477,915,489.59/279,137.16
  6. Step 6: Final answer
    x = 209,495.27

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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.