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Finding the Fourth Proportional to 681,643.98, 940,558.06 and 395,108.10

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Solution

The fourth proportional to 681,643.98, 940,558.06 and 395,108.10 is: 545,185.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,643.98 : 940,558.06 = 395,108.10 : x
  2. Step 2: Convert to fraction form
    681,643.98/940,558.06 = 395,108.10/x
  3. Step 3: Cross multiply
    681,643.98x = 940,558.06 × 395,108.10
  4. Step 4: Simplify right side
    681,643.98x = 371,622,108,026.29
  5. Step 5: Solve for x
    x = 371,622,108,026.29/681,643.98
  6. Step 6: Final answer
    x = 545,185.05

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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.