Finding the Fourth Proportional to 1,287,391.32, 1,776,418.68 and 771,024.21
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Solution
The fourth proportional to 1,287,391.32, 1,776,418.68 and 771,024.21 is: 1,063,904.80
Step by Step Solution
- Step 1: Write the proportion equation
1,287,391.32 : 1,776,418.68 = 771,024.21 : x - Step 2: Convert to fraction form
1,287,391.32/1,776,418.68 = 771,024.21/x - Step 3: Cross multiply
1,287,391.32x = 1,776,418.68 × 771,024.21 - Step 4: Simplify right side
1,287,391.32x = 1,369,661,809,376.24 - Step 5: Solve for x
x = 1,369,661,809,376.24/1,287,391.32 - Step 6: Final answer
x = 1,063,904.80
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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.