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Finding the Fourth Proportional to 291,235.76, 401,918.28 and 163,919.60

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Solution

The fourth proportional to 291,235.76, 401,918.28 and 163,919.60 is: 226,216.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,235.76 : 401,918.28 = 163,919.60 : x
  2. Step 2: Convert to fraction form
    291,235.76/401,918.28 = 163,919.60/x
  3. Step 3: Cross multiply
    291,235.76x = 401,918.28 × 163,919.60
  4. Step 4: Simplify right side
    291,235.76x = 65,882,283,690.29
  5. Step 5: Solve for x
    x = 65,882,283,690.29/291,235.76
  6. Step 6: Final answer
    x = 226,216.33

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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.