Finding the Fourth Proportional to 686,708.60, 1,029,965.70 and 213,441.80
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Solution
The fourth proportional to 686,708.60, 1,029,965.70 and 213,441.80 is: 320,132.49
Step by Step Solution
- Step 1: Write the proportion equation
686,708.60 : 1,029,965.70 = 213,441.80 : x - Step 2: Convert to fraction form
686,708.60/1,029,965.70 = 213,441.80/x - Step 3: Cross multiply
686,708.60x = 1,029,965.70 × 213,441.80 - Step 4: Simplify right side
686,708.60x = 219,837,732,946.26 - Step 5: Solve for x
x = 219,837,732,946.26/686,708.60 - Step 6: Final answer
x = 320,132.49
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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.