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Finding the Fourth Proportional to 1,205,434, 1,663,576.68 and 668,890

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Solution

The fourth proportional to 1,205,434, 1,663,576.68 and 668,890 is: 923,111.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,205,434 : 1,663,576.68 = 668,890 : x
  2. Step 2: Convert to fraction form
    1,205,434/1,663,576.68 = 668,890/x
  3. Step 3: Cross multiply
    1,205,434x = 1,663,576.68 × 668,890
  4. Step 4: Simplify right side
    1,205,434x = 1,112,749,805,485.20
  5. Step 5: Solve for x
    x = 1,112,749,805,485.20/1,205,434
  6. Step 6: Final answer
    x = 923,111.35

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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.