Finding the Fourth Proportional to 679,942.68, 938,321.85 and 378,136.68
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Solution
The fourth proportional to 679,942.68, 938,321.85 and 378,136.68 is: 521,829.15
Step by Step Solution
- Step 1: Write the proportion equation
679,942.68 : 938,321.85 = 378,136.68 : x - Step 2: Convert to fraction form
679,942.68/938,321.85 = 378,136.68/x - Step 3: Cross multiply
679,942.68x = 938,321.85 × 378,136.68 - Step 4: Simplify right side
679,942.68x = 354,813,909,130.46 - Step 5: Solve for x
x = 354,813,909,130.46/679,942.68 - Step 6: Final answer
x = 521,829.15
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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.