Finding the Fourth Proportional to 1,383,943.71, 1,909,908.68 and 780,318.75
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Solution
The fourth proportional to 1,383,943.71, 1,909,908.68 and 780,318.75 is: 1,076,877.29
Step by Step Solution
- Step 1: Write the proportion equation
1,383,943.71 : 1,909,908.68 = 780,318.75 : x - Step 2: Convert to fraction form
1,383,943.71/1,909,908.68 = 780,318.75/x - Step 3: Cross multiply
1,383,943.71x = 1,909,908.68 × 780,318.75 - Step 4: Simplify right side
1,383,943.71x = 1,490,337,549,890.16 - Step 5: Solve for x
x = 1,490,337,549,890.16/1,383,943.71 - Step 6: Final answer
x = 1,076,877.29
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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.