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Finding the Fourth Proportional to 665,998.05, 918,464.02 and 436,471.73

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Solution

The fourth proportional to 665,998.05, 918,464.02 and 436,471.73 is: 601,929.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,998.05 : 918,464.02 = 436,471.73 : x
  2. Step 2: Convert to fraction form
    665,998.05/918,464.02 = 436,471.73/x
  3. Step 3: Cross multiply
    665,998.05x = 918,464.02 × 436,471.73
  4. Step 4: Simplify right side
    665,998.05x = 400,883,579,752.16
  5. Step 5: Solve for x
    x = 400,883,579,752.16/665,998.05
  6. Step 6: Final answer
    x = 601,929.06

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Double scale
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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.