Finding the Fourth Proportional to 1,225,861,331.40, 1,838,791,997.10 and 815,587,129.80
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Solution
The fourth proportional to 1,225,861,331.40, 1,838,791,997.10 and 815,587,129.80 is: 1,223,380,694.70
Step by Step Solution
- Step 1: Write the proportion equation
1,225,861,331.40 : 1,838,791,997.10 = 815,587,129.80 : x - Step 2: Convert to fraction form
1,225,861,331.40/1,838,791,997.10 = 815,587,129.80/x - Step 3: Cross multiply
1,225,861,331.40x = 1,838,791,997.10 × 815,587,129.80 - Step 4: Simplify right side
1,225,861,331.40x = 1,499,695,087,213,998,848 - Step 5: Solve for x
x = 1,499,695,087,213,998,848/1,225,861,331.40 - Step 6: Final answer
x = 1,223,380,694.70
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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.