Finding the Fourth Proportional to 686,430.79, 1,029,635.25 and 213,116.60
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Solution
The fourth proportional to 686,430.79, 1,029,635.25 and 213,116.60 is: 319,671.51
Step by Step Solution
- Step 1: Write the proportion equation
686,430.79 : 1,029,635.25 = 213,116.60 : x - Step 2: Convert to fraction form
686,430.79/1,029,635.25 = 213,116.60/x - Step 3: Cross multiply
686,430.79x = 1,029,635.25 × 213,116.60 - Step 4: Simplify right side
686,430.79x = 219,432,365,495.05 - Step 5: Solve for x
x = 219,432,365,495.05/686,430.79 - Step 6: Final answer
x = 319,671.51
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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.