Finding the Fourth Proportional to 1,392,011.37, 1,921,135.05 and 780,329.34
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Solution
The fourth proportional to 1,392,011.37, 1,921,135.05 and 780,329.34 is: 1,076,943.82
Step by Step Solution
- Step 1: Write the proportion equation
1,392,011.37 : 1,921,135.05 = 780,329.34 : x - Step 2: Convert to fraction form
1,392,011.37/1,921,135.05 = 780,329.34/x - Step 3: Cross multiply
1,392,011.37x = 1,921,135.05 × 780,329.34 - Step 4: Simplify right side
1,392,011.37x = 1,499,118,045,617.37 - Step 5: Solve for x
x = 1,499,118,045,617.37/1,392,011.37 - Step 6: Final answer
x = 1,076,943.82
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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.