Finding the Fourth Proportional to 1,126,471,028.79, 1,554,500,563.20 and 624,678,534.12
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Solution
The fourth proportional to 1,126,471,028.79, 1,554,500,563.20 and 624,678,534.12 is: 862,040,042.12
Step by Step Solution
- Step 1: Write the proportion equation
1,126,471,028.79 : 1,554,500,563.20 = 624,678,534.12 : x - Step 2: Convert to fraction form
1,126,471,028.79/1,554,500,563.20 = 624,678,534.12/x - Step 3: Cross multiply
1,126,471,028.79x = 1,554,500,563.20 × 624,678,534.12 - Step 4: Simplify right side
1,126,471,028.79x = 971,063,133,108,490,496 - Step 5: Solve for x
x = 971,063,133,108,490,496/1,126,471,028.79 - Step 6: Final answer
x = 862,040,042.12
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Double scale
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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.