Finding the Fourth Proportional to 489,107.40, 674,681.62 and 307,531.60
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Solution
The fourth proportional to 489,107.40, 674,681.62 and 307,531.60 is: 424,213.41
Step by Step Solution
- Step 1: Write the proportion equation
489,107.40 : 674,681.62 = 307,531.60 : x - Step 2: Convert to fraction form
489,107.40/674,681.62 = 307,531.60/x - Step 3: Cross multiply
489,107.40x = 674,681.62 × 307,531.60 - Step 4: Simplify right side
489,107.40x = 207,485,918,089.19 - Step 5: Solve for x
x = 207,485,918,089.19/489,107.40 - Step 6: Final answer
x = 424,213.41
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1.5x scale
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.