Finding the Fourth Proportional to 1,292,912,154.99, 1,939,368,258.23 and 310,338,694.49
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Solution
The fourth proportional to 1,292,912,154.99, 1,939,368,258.23 and 310,338,694.49 is: 465,508,047.91
Step by Step Solution
- Step 1: Write the proportion equation
1,292,912,154.99 : 1,939,368,258.23 = 310,338,694.49 : x - Step 2: Convert to fraction form
1,292,912,154.99/1,939,368,258.23 = 310,338,694.49/x - Step 3: Cross multiply
1,292,912,154.99x = 1,939,368,258.23 × 310,338,694.49 - Step 4: Simplify right side
1,292,912,154.99x = 601,861,013,383,194,880 - Step 5: Solve for x
x = 601,861,013,383,194,880/1,292,912,154.99 - Step 6: Final answer
x = 465,508,047.91
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Double scale
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Similar ratio
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1.5x scale
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.