Finding the Fourth Proportional to 1,288,639.80, 1,778,327.04 and 715,679.94
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Solution
The fourth proportional to 1,288,639.80, 1,778,327.04 and 715,679.94 is: 987,640.60
Step by Step Solution
- Step 1: Write the proportion equation
1,288,639.80 : 1,778,327.04 = 715,679.94 : x - Step 2: Convert to fraction form
1,288,639.80/1,778,327.04 = 715,679.94/x - Step 3: Cross multiply
1,288,639.80x = 1,778,327.04 × 715,679.94 - Step 4: Simplify right side
1,288,639.80x = 1,272,712,989,287.58 - Step 5: Solve for x
x = 1,272,712,989,287.58/1,288,639.80 - Step 6: Final answer
x = 987,640.60
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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.