Finding the Fourth Proportional to 1,271,215,276.80, 1,908,040,636.80 and 658,239,417.60
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Solution
The fourth proportional to 1,271,215,276.80, 1,908,040,636.80 and 658,239,417.60 is: 987,989,666.62
Step by Step Solution
- Step 1: Write the proportion equation
1,271,215,276.80 : 1,908,040,636.80 = 658,239,417.60 : x - Step 2: Convert to fraction form
1,271,215,276.80/1,908,040,636.80 = 658,239,417.60/x - Step 3: Cross multiply
1,271,215,276.80x = 1,908,040,636.80 × 658,239,417.60 - Step 4: Simplify right side
1,271,215,276.80x = 1,255,947,557,524,365,056 - Step 5: Solve for x
x = 1,255,947,557,524,365,056/1,271,215,276.80 - Step 6: Final answer
x = 987,989,666.62
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.