Finding the Fourth Proportional to 287,964,090.99, 397,390,439.39 and 155,805,087.55
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Solution
The fourth proportional to 287,964,090.99, 397,390,439.39 and 155,805,087.55 is: 215,011,017.48
Step by Step Solution
- Step 1: Write the proportion equation
287,964,090.99 : 397,390,439.39 = 155,805,087.55 : x - Step 2: Convert to fraction form
287,964,090.99/397,390,439.39 = 155,805,087.55/x - Step 3: Cross multiply
287,964,090.99x = 397,390,439.39 × 155,805,087.55 - Step 4: Simplify right side
287,964,090.99x = 61,915,452,200,691,920 - Step 5: Solve for x
x = 61,915,452,200,691,920/287,964,090.99 - Step 6: Final answer
x = 215,011,017.48
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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.