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Finding the Fourth Proportional to 1,229,688, 1,696,969.44 and 664,440

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Solution

The fourth proportional to 1,229,688, 1,696,969.44 and 664,440 is: 916,927.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229,688 : 1,696,969.44 = 664,440 : x
  2. Step 2: Convert to fraction form
    1,229,688/1,696,969.44 = 664,440/x
  3. Step 3: Cross multiply
    1,229,688x = 1,696,969.44 × 664,440
  4. Step 4: Simplify right side
    1,229,688x = 1,127,534,374,713.60
  5. Step 5: Solve for x
    x = 1,127,534,374,713.60/1,229,688
  6. Step 6: Final answer
    x = 916,927.20

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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.