Home / 1,188,430.07-1,640,030.94-644,563.05

Finding the Fourth Proportional to 1,188,430.07, 1,640,030.94 and 644,563.05

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Solution

The fourth proportional to 1,188,430.07, 1,640,030.94 and 644,563.05 is: 889,495.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,430.07 : 1,640,030.94 = 644,563.05 : x
  2. Step 2: Convert to fraction form
    1,188,430.07/1,640,030.94 = 644,563.05/x
  3. Step 3: Cross multiply
    1,188,430.07x = 1,640,030.94 × 644,563.05
  4. Step 4: Simplify right side
    1,188,430.07x = 1,057,103,344,780.77
  5. Step 5: Solve for x
    x = 1,057,103,344,780.77/1,188,430.07
  6. Step 6: Final answer
    x = 889,495.63

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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.