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Finding the Fourth Proportional to 644,606.87, 889,572.31 and 354,236.49

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Solution

The fourth proportional to 644,606.87, 889,572.31 and 354,236.49 is: 488,854.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,606.87 : 889,572.31 = 354,236.49 : x
  2. Step 2: Convert to fraction form
    644,606.87/889,572.31 = 354,236.49/x
  3. Step 3: Cross multiply
    644,606.87x = 889,572.31 × 354,236.49
  4. Step 4: Simplify right side
    644,606.87x = 315,118,971,810.00
  5. Step 5: Solve for x
    x = 315,118,971,810.00/644,606.87
  6. Step 6: Final answer
    x = 488,854.51

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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.