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Finding the Fourth Proportional to 439,006.58, 605,816.64 and 257,715.62

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Solution

The fourth proportional to 439,006.58, 605,816.64 and 257,715.62 is: 355,640.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,006.58 : 605,816.64 = 257,715.62 : x
  2. Step 2: Convert to fraction form
    439,006.58/605,816.64 = 257,715.62/x
  3. Step 3: Cross multiply
    439,006.58x = 605,816.64 × 257,715.62
  4. Step 4: Simplify right side
    439,006.58x = 156,128,410,983.92
  5. Step 5: Solve for x
    x = 156,128,410,983.92/439,006.58
  6. Step 6: Final answer
    x = 355,640.25

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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.