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Finding the Fourth Proportional to 644,777.07, 889,801.60 and 354,415.52

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Solution

The fourth proportional to 644,777.07, 889,801.60 and 354,415.52 is: 489,098.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,777.07 : 889,801.60 = 354,415.52 : x
  2. Step 2: Convert to fraction form
    644,777.07/889,801.60 = 354,415.52/x
  3. Step 3: Cross multiply
    644,777.07x = 889,801.60 × 354,415.52
  4. Step 4: Simplify right side
    644,777.07x = 315,359,493,650.29
  5. Step 5: Solve for x
    x = 315,359,493,650.29/644,777.07
  6. Step 6: Final answer
    x = 489,098.50

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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.