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Finding the Fourth Proportional to 449,783.34, 620,640.90 and 288,856.32

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Solution

The fourth proportional to 449,783.34, 620,640.90 and 288,856.32 is: 398,583.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,783.34 : 620,640.90 = 288,856.32 : x
  2. Step 2: Convert to fraction form
    449,783.34/620,640.90 = 288,856.32/x
  3. Step 3: Cross multiply
    449,783.34x = 620,640.90 × 288,856.32
  4. Step 4: Simplify right side
    449,783.34x = 179,276,046,415.49
  5. Step 5: Solve for x
    x = 179,276,046,415.49/449,783.34
  6. Step 6: Final answer
    x = 398,583.12

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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.