Home / 1,188,430.32-1,640,029.12-644,563.92

Finding the Fourth Proportional to 1,188,430.32, 1,640,029.12 and 644,563.92

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Solution

The fourth proportional to 1,188,430.32, 1,640,029.12 and 644,563.92 is: 889,495.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,430.32 : 1,640,029.12 = 644,563.92 : x
  2. Step 2: Convert to fraction form
    1,188,430.32/1,640,029.12 = 644,563.92/x
  3. Step 3: Cross multiply
    1,188,430.32x = 1,640,029.12 × 644,563.92
  4. Step 4: Simplify right side
    1,188,430.32x = 1,057,103,598,501.35
  5. Step 5: Solve for x
    x = 1,057,103,598,501.35/1,188,430.32
  6. Step 6: Final answer
    x = 889,495.65

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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.