Finding the Fourth Proportional to 819,983.76, 1,131,090.43 and 638,408.08
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Solution
The fourth proportional to 819,983.76, 1,131,090.43 and 638,408.08 is: 880,623.87
Step by Step Solution
- Step 1: Write the proportion equation
819,983.76 : 1,131,090.43 = 638,408.08 : x - Step 2: Convert to fraction form
819,983.76/1,131,090.43 = 638,408.08/x - Step 3: Cross multiply
819,983.76x = 1,131,090.43 × 638,408.08 - Step 4: Simplify right side
819,983.76x = 722,097,270,737.53 - Step 5: Solve for x
x = 722,097,270,737.53/819,983.76 - Step 6: Final answer
x = 880,623.87
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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.