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Finding the Fourth Proportional to 521,644.41, 786,489.42 and 518,405.94

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Solution

The fourth proportional to 521,644.41, 786,489.42 and 518,405.94 is: 781,606.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,644.41 : 786,489.42 = 518,405.94 : x
  2. Step 2: Convert to fraction form
    521,644.41/786,489.42 = 518,405.94/x
  3. Step 3: Cross multiply
    521,644.41x = 786,489.42 × 518,405.94
  4. Step 4: Simplify right side
    521,644.41x = 407,720,787,075.16
  5. Step 5: Solve for x
    x = 407,720,787,075.16/521,644.41
  6. Step 6: Final answer
    x = 781,606.74

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.