Finding the Fourth Proportional to 985,999.80, 1,478,135.70 and 669,430.20
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Solution
The fourth proportional to 985,999.80, 1,478,135.70 and 669,430.20 is: 1,003,558.70
Step by Step Solution
- Step 1: Write the proportion equation
985,999.80 : 1,478,135.70 = 669,430.20 : x - Step 2: Convert to fraction form
985,999.80/1,478,135.70 = 669,430.20/x - Step 3: Cross multiply
985,999.80x = 1,478,135.70 × 669,430.20 - Step 4: Simplify right side
985,999.80x = 989,508,677,278.14 - Step 5: Solve for x
x = 989,508,677,278.14/985,999.80 - Step 6: Final answer
x = 1,003,558.70
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.