Finding the Fourth Proportional to 1,581,133,138.40, 2,181,963,937.84 and 876,330,623.20
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Solution
The fourth proportional to 1,581,133,138.40, 2,181,963,937.84 and 876,330,623.20 is: 1,209,336,374.66
Step by Step Solution
- Step 1: Write the proportion equation
1,581,133,138.40 : 2,181,963,937.84 = 876,330,623.20 : x - Step 2: Convert to fraction form
1,581,133,138.40/2,181,963,937.84 = 876,330,623.20/x - Step 3: Cross multiply
1,581,133,138.40x = 2,181,963,937.84 × 876,330,623.20 - Step 4: Simplify right side
1,581,133,138.40x = 1,912,121,817,447,253,504 - Step 5: Solve for x
x = 1,912,121,817,447,253,504/1,581,133,138.40 - Step 6: Final answer
x = 1,209,336,374.66
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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.