Finding the Fourth Proportional to 1,215,838,616.95, 1,678,680,927.35 and 770,197,446.91
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Solution
The fourth proportional to 1,215,838,616.95, 1,678,680,927.35 and 770,197,446.91 is: 1,063,394,225.51
Step by Step Solution
- Step 1: Write the proportion equation
1,215,838,616.95 : 1,678,680,927.35 = 770,197,446.91 : x - Step 2: Convert to fraction form
1,215,838,616.95/1,678,680,927.35 = 770,197,446.91/x - Step 3: Cross multiply
1,215,838,616.95x = 1,678,680,927.35 × 770,197,446.91 - Step 4: Simplify right side
1,215,838,616.95x = 1,292,915,764,421,480,960 - Step 5: Solve for x
x = 1,292,915,764,421,480,960/1,215,838,616.95 - Step 6: Final answer
x = 1,063,394,225.51
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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.