Finding the Fourth Proportional to 1,215,838,610.70, 1,678,680,918.72 and 770,197,440.66
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Solution
The fourth proportional to 1,215,838,610.70, 1,678,680,918.72 and 770,197,440.66 is: 1,063,394,216.88
Step by Step Solution
- Step 1: Write the proportion equation
1,215,838,610.70 : 1,678,680,918.72 = 770,197,440.66 : x - Step 2: Convert to fraction form
1,215,838,610.70/1,678,680,918.72 = 770,197,440.66/x - Step 3: Cross multiply
1,215,838,610.70x = 1,678,680,918.72 × 770,197,440.66 - Step 4: Simplify right side
1,215,838,610.70x = 1,292,915,747,282,921,472 - Step 5: Solve for x
x = 1,292,915,747,282,921,472/1,215,838,610.70 - Step 6: Final answer
x = 1,063,394,216.88
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1.5x scale
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.