Finding the Fourth Proportional to 668,403.09, 922,383.65 and 378,009.59
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Solution
The fourth proportional to 668,403.09, 922,383.65 and 378,009.59 is: 521,646.09
Step by Step Solution
- Step 1: Write the proportion equation
668,403.09 : 922,383.65 = 378,009.59 : x - Step 2: Convert to fraction form
668,403.09/922,383.65 = 378,009.59/x - Step 3: Cross multiply
668,403.09x = 922,383.65 × 378,009.59 - Step 4: Simplify right side
668,403.09x = 348,669,861,692.31 - Step 5: Solve for x
x = 348,669,861,692.31/668,403.09 - Step 6: Final answer
x = 521,646.09
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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.