Finding the Fourth Proportional to 1,378,538.12, 1,902,365.70 and 774,926.12
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Solution
The fourth proportional to 1,378,538.12, 1,902,365.70 and 774,926.12 is: 1,069,388.54
Step by Step Solution
- Step 1: Write the proportion equation
1,378,538.12 : 1,902,365.70 = 774,926.12 : x - Step 2: Convert to fraction form
1,378,538.12/1,902,365.70 = 774,926.12/x - Step 3: Cross multiply
1,378,538.12x = 1,902,365.70 × 774,926.12 - Step 4: Simplify right side
1,378,538.12x = 1,474,192,872,572.03 - Step 5: Solve for x
x = 1,474,192,872,572.03/1,378,538.12 - Step 6: Final answer
x = 1,069,388.54
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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.