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Finding the Fourth Proportional to 289,112.64, 433,561.32 and 99,520.08

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Solution

The fourth proportional to 289,112.64, 433,561.32 and 99,520.08 is: 149,243.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,112.64 : 433,561.32 = 99,520.08 : x
  2. Step 2: Convert to fraction form
    289,112.64/433,561.32 = 99,520.08/x
  3. Step 3: Cross multiply
    289,112.64x = 433,561.32 × 99,520.08
  4. Step 4: Simplify right side
    289,112.64x = 43,148,057,251.31
  5. Step 5: Solve for x
    x = 43,148,057,251.31/289,112.64
  6. Step 6: Final answer
    x = 149,243.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.