Finding the Fourth Proportional to 640,939.80, 961,409.70 and 286,645.80
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Solution
The fourth proportional to 640,939.80, 961,409.70 and 286,645.80 is: 429,968.70
Step by Step Solution
- Step 1: Write the proportion equation
640,939.80 : 961,409.70 = 286,645.80 : x - Step 2: Convert to fraction form
640,939.80/961,409.70 = 286,645.80/x - Step 3: Cross multiply
640,939.80x = 961,409.70 × 286,645.80 - Step 4: Simplify right side
640,939.80x = 275,584,052,584.26 - Step 5: Solve for x
x = 275,584,052,584.26/640,939.80 - Step 6: Final answer
x = 429,968.70
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.