Finding the Fourth Proportional to 636,386.28, 878,346.63 and 403,662.75
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Solution
The fourth proportional to 636,386.28, 878,346.63 and 403,662.75 is: 557,139.32
Step by Step Solution
- Step 1: Write the proportion equation
636,386.28 : 878,346.63 = 403,662.75 : x - Step 2: Convert to fraction form
636,386.28/878,346.63 = 403,662.75/x - Step 3: Cross multiply
636,386.28x = 878,346.63 × 403,662.75 - Step 4: Simplify right side
636,386.28x = 354,555,816,119.03 - Step 5: Solve for x
x = 354,555,816,119.03/636,386.28 - Step 6: Final answer
x = 557,139.32
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1.5x scale
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.