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Finding the Fourth Proportional to 1,691,867.88, 2,334,795.76 and 917,500.18

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Solution

The fourth proportional to 1,691,867.88, 2,334,795.76 and 917,500.18 is: 1,266,160.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691,867.88 : 2,334,795.76 = 917,500.18 : x
  2. Step 2: Convert to fraction form
    1,691,867.88/2,334,795.76 = 917,500.18/x
  3. Step 3: Cross multiply
    1,691,867.88x = 2,334,795.76 × 917,500.18
  4. Step 4: Simplify right side
    1,691,867.88x = 2,142,175,530,063.24
  5. Step 5: Solve for x
    x = 2,142,175,530,063.24/1,691,867.88
  6. Step 6: Final answer
    x = 1,266,160.06

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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.