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Finding the Fourth Proportional to 813,800.56, 1,122,999.88 and 451,203.28

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Solution

The fourth proportional to 813,800.56, 1,122,999.88 and 451,203.28 is: 622,635.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,800.56 : 1,122,999.88 = 451,203.28 : x
  2. Step 2: Convert to fraction form
    813,800.56/1,122,999.88 = 451,203.28/x
  3. Step 3: Cross multiply
    813,800.56x = 1,122,999.88 × 451,203.28
  4. Step 4: Simplify right side
    813,800.56x = 506,701,229,295.61
  5. Step 5: Solve for x
    x = 506,701,229,295.61/813,800.56
  6. Step 6: Final answer
    x = 622,635.64

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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.