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Finding the Fourth Proportional to 623,605.48, 860,583.42 and 378,519.40

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Solution

The fourth proportional to 623,605.48, 860,583.42 and 378,519.40 is: 522,361.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,605.48 : 860,583.42 = 378,519.40 : x
  2. Step 2: Convert to fraction form
    623,605.48/860,583.42 = 378,519.40/x
  3. Step 3: Cross multiply
    623,605.48x = 860,583.42 × 378,519.40
  4. Step 4: Simplify right side
    623,605.48x = 325,747,519,788.35
  5. Step 5: Solve for x
    x = 325,747,519,788.35/623,605.48
  6. Step 6: Final answer
    x = 522,361.54

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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.