Finding the Fourth Proportional to 761,408.12, 1,051,220.99 and 489,947.78
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Solution
The fourth proportional to 761,408.12, 1,051,220.99 and 489,947.78 is: 676,435.37
Step by Step Solution
- Step 1: Write the proportion equation
761,408.12 : 1,051,220.99 = 489,947.78 : x - Step 2: Convert to fraction form
761,408.12/1,051,220.99 = 489,947.78/x - Step 3: Cross multiply
761,408.12x = 1,051,220.99 × 489,947.78 - Step 4: Simplify right side
761,408.12x = 515,043,382,634.06 - Step 5: Solve for x
x = 515,043,382,634.06/761,408.12 - Step 6: Final answer
x = 676,435.37
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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.