Finding the Fourth Proportional to 740,137.80, 1,021,389.84 and 438,331.80
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Solution
The fourth proportional to 740,137.80, 1,021,389.84 and 438,331.80 is: 604,897.69
Step by Step Solution
- Step 1: Write the proportion equation
740,137.80 : 1,021,389.84 = 438,331.80 : x - Step 2: Convert to fraction form
740,137.80/1,021,389.84 = 438,331.80/x - Step 3: Cross multiply
740,137.80x = 1,021,389.84 × 438,331.80 - Step 4: Simplify right side
740,137.80x = 447,707,647,068.91 - Step 5: Solve for x
x = 447,707,647,068.91/740,137.80 - Step 6: Final answer
x = 604,897.69
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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.