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Finding the Fourth Proportional to 644,405.92, 889,255.36 and 357,944.32

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Solution

The fourth proportional to 644,405.92, 889,255.36 and 357,944.32 is: 493,949.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,405.92 : 889,255.36 = 357,944.32 : x
  2. Step 2: Convert to fraction form
    644,405.92/889,255.36 = 357,944.32/x
  3. Step 3: Cross multiply
    644,405.92x = 889,255.36 × 357,944.32
  4. Step 4: Simplify right side
    644,405.92x = 318,303,905,141.56
  5. Step 5: Solve for x
    x = 318,303,905,141.56/644,405.92
  6. Step 6: Final answer
    x = 493,949.38

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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.