Finding the Fourth Proportional to 2,138,928,020.98, 3,206,127,592.13 and 719,473,855.11
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Solution
The fourth proportional to 2,138,928,020.98, 3,206,127,592.13 and 719,473,855.11 is: 1,078,449,090.41
Step by Step Solution
- Step 1: Write the proportion equation
2,138,928,020.98 : 3,206,127,592.13 = 719,473,855.11 : x - Step 2: Convert to fraction form
2,138,928,020.98/3,206,127,592.13 = 719,473,855.11/x - Step 3: Cross multiply
2,138,928,020.98x = 3,206,127,592.13 × 719,473,855.11 - Step 4: Simplify right side
2,138,928,020.98x = 2,306,724,978,668,692,480 - Step 5: Solve for x
x = 2,306,724,978,668,692,480/2,138,928,020.98 - Step 6: Final answer
x = 1,078,449,090.41
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.