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Finding the Fourth Proportional to 644,515.76, 889,457.02 and 440,993.56

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Solution

The fourth proportional to 644,515.76, 889,457.02 and 440,993.56 is: 608,588.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,515.76 : 889,457.02 = 440,993.56 : x
  2. Step 2: Convert to fraction form
    644,515.76/889,457.02 = 440,993.56/x
  3. Step 3: Cross multiply
    644,515.76x = 889,457.02 × 440,993.56
  4. Step 4: Simplify right side
    644,515.76x = 392,244,817,716.79
  5. Step 5: Solve for x
    x = 392,244,817,716.79/644,515.76
  6. Step 6: Final answer
    x = 608,588.40

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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.