Home / 1,188,637.80-1,640,310.50-644,772.28

Finding the Fourth Proportional to 1,188,637.80, 1,640,310.50 and 644,772.28

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Solution

The fourth proportional to 1,188,637.80, 1,640,310.50 and 644,772.28 is: 889,780.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,637.80 : 1,640,310.50 = 644,772.28 : x
  2. Step 2: Convert to fraction form
    1,188,637.80/1,640,310.50 = 644,772.28/x
  3. Step 3: Cross multiply
    1,188,637.80x = 1,640,310.50 × 644,772.28
  4. Step 4: Simplify right side
    1,188,637.80x = 1,057,626,740,992.94
  5. Step 5: Solve for x
    x = 1,057,626,740,992.94/1,188,637.80
  6. Step 6: Final answer
    x = 889,780.50

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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.