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Finding the Fourth Proportional to 644,991.82, 890,066.01 and 354,601.27

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Solution

The fourth proportional to 644,991.82, 890,066.01 and 354,601.27 is: 489,337.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,991.82 : 890,066.01 = 354,601.27 : x
  2. Step 2: Convert to fraction form
    644,991.82/890,066.01 = 354,601.27/x
  3. Step 3: Cross multiply
    644,991.82x = 890,066.01 × 354,601.27
  4. Step 4: Simplify right side
    644,991.82x = 315,618,537,529.83
  5. Step 5: Solve for x
    x = 315,618,537,529.83/644,991.82
  6. Step 6: Final answer
    x = 489,337.27

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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.