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Finding the Fourth Proportional to 623,585.99, 860,686.41 and 405,414.97

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Solution

The fourth proportional to 623,585.99, 860,686.41 and 405,414.97 is: 559,562.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,585.99 : 860,686.41 = 405,414.97 : x
  2. Step 2: Convert to fraction form
    623,585.99/860,686.41 = 405,414.97/x
  3. Step 3: Cross multiply
    623,585.99x = 860,686.41 × 405,414.97
  4. Step 4: Simplify right side
    623,585.99x = 348,935,157,019.05
  5. Step 5: Solve for x
    x = 348,935,157,019.05/623,585.99
  6. Step 6: Final answer
    x = 559,562.21

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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.