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Finding the Fourth Proportional to 800,709.54, 1,104,979.17 and 438,133.40

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Solution

The fourth proportional to 800,709.54, 1,104,979.17 and 438,133.40 is: 604,624.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,709.54 : 1,104,979.17 = 438,133.40 : x
  2. Step 2: Convert to fraction form
    800,709.54/1,104,979.17 = 438,133.40/x
  3. Step 3: Cross multiply
    800,709.54x = 1,104,979.17 × 438,133.40
  4. Step 4: Simplify right side
    800,709.54x = 484,128,283,443.73
  5. Step 5: Solve for x
    x = 484,128,283,443.73/800,709.54
  6. Step 6: Final answer
    x = 604,624.10

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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.