Finding the Fourth Proportional to 1,188,981.99, 1,640,782.17 and 645,129.77
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Solution
The fourth proportional to 1,188,981.99, 1,640,782.17 and 645,129.77 is: 890,272.03
Step by Step Solution
- Step 1: Write the proportion equation
1,188,981.99 : 1,640,782.17 = 645,129.77 : x - Step 2: Convert to fraction form
1,188,981.99/1,640,782.17 = 645,129.77/x - Step 3: Cross multiply
1,188,981.99x = 1,640,782.17 × 645,129.77 - Step 4: Simplify right side
1,188,981.99x = 1,058,517,415,748.29 - Step 5: Solve for x
x = 1,058,517,415,748.29/1,188,981.99 - Step 6: Final answer
x = 890,272.03
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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.