Finding the Fourth Proportional to 709,414.12, 979,012.38 and 387,145.09
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Solution
The fourth proportional to 709,414.12, 979,012.38 and 387,145.09 is: 534,271.63
Step by Step Solution
- Step 1: Write the proportion equation
709,414.12 : 979,012.38 = 387,145.09 : x - Step 2: Convert to fraction form
709,414.12/979,012.38 = 387,145.09/x - Step 3: Cross multiply
709,414.12x = 979,012.38 × 387,145.09 - Step 4: Simplify right side
709,414.12x = 379,019,835,966.21 - Step 5: Solve for x
x = 379,019,835,966.21/709,414.12 - Step 6: Final answer
x = 534,271.63
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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.