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Finding the Fourth Proportional to 681,814.16, 940,229.40 and 578,729.85

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Solution

The fourth proportional to 681,814.16, 940,229.40 and 578,729.85 is: 798,074.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,814.16 : 940,229.40 = 578,729.85 : x
  2. Step 2: Convert to fraction form
    681,814.16/940,229.40 = 578,729.85/x
  3. Step 3: Cross multiply
    681,814.16x = 940,229.40 × 578,729.85
  4. Step 4: Simplify right side
    681,814.16x = 544,138,819,627.59
  5. Step 5: Solve for x
    x = 544,138,819,627.59/681,814.16
  6. Step 6: Final answer
    x = 798,074.98

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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.