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Finding the Fourth Proportional to 1,222,712, 1,687,498.08 and 686,168

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Solution

The fourth proportional to 1,222,712, 1,687,498.08 and 686,168 is: 946,999.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222,712 : 1,687,498.08 = 686,168 : x
  2. Step 2: Convert to fraction form
    1,222,712/1,687,498.08 = 686,168/x
  3. Step 3: Cross multiply
    1,222,712x = 1,687,498.08 × 686,168
  4. Step 4: Simplify right side
    1,222,712x = 1,157,907,182,557.44
  5. Step 5: Solve for x
    x = 1,157,907,182,557.44/1,222,712
  6. Step 6: Final answer
    x = 946,999.12

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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.