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Finding the Fourth Proportional to 681,911.76, 940,829.40 and 395,374.32

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Solution

The fourth proportional to 681,911.76, 940,829.40 and 395,374.32 is: 545,495.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,911.76 : 940,829.40 = 395,374.32 : x
  2. Step 2: Convert to fraction form
    681,911.76/940,829.40 = 395,374.32/x
  3. Step 3: Cross multiply
    681,911.76x = 940,829.40 × 395,374.32
  4. Step 4: Simplify right side
    681,911.76x = 371,979,784,261.01
  5. Step 5: Solve for x
    x = 371,979,784,261.01/681,911.76
  6. Step 6: Final answer
    x = 545,495.48

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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.