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Finding the Fourth Proportional to 621,807.60, 933,172.20 and 411,375.60

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Solution

The fourth proportional to 621,807.60, 933,172.20 and 411,375.60 is: 617,368.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,807.60 : 933,172.20 = 411,375.60 : x
  2. Step 2: Convert to fraction form
    621,807.60/933,172.20 = 411,375.60/x
  3. Step 3: Cross multiply
    621,807.60x = 933,172.20 × 411,375.60
  4. Step 4: Simplify right side
    621,807.60x = 383,884,273,678.32
  5. Step 5: Solve for x
    x = 383,884,273,678.32/621,807.60
  6. Step 6: Final answer
    x = 617,368.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.