Finding the Fourth Proportional to 1,392,005.06, 1,921,101.84 and 780,261.74
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Solution
The fourth proportional to 1,392,005.06, 1,921,101.84 and 780,261.74 is: 1,076,836.79
Step by Step Solution
- Step 1: Write the proportion equation
1,392,005.06 : 1,921,101.84 = 780,261.74 : x - Step 2: Convert to fraction form
1,392,005.06/1,921,101.84 = 780,261.74/x - Step 3: Cross multiply
1,392,005.06x = 1,921,101.84 × 780,261.74 - Step 4: Simplify right side
1,392,005.06x = 1,498,962,264,395.60 - Step 5: Solve for x
x = 1,498,962,264,395.60/1,392,005.06 - Step 6: Final answer
x = 1,076,836.79
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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.