Finding the Fourth Proportional to 839,811,072.80, 1,259,716,609.20 and 576,783,207.20
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Solution
The fourth proportional to 839,811,072.80, 1,259,716,609.20 and 576,783,207.20 is: 865,174,810.80
Step by Step Solution
- Step 1: Write the proportion equation
839,811,072.80 : 1,259,716,609.20 = 576,783,207.20 : x - Step 2: Convert to fraction form
839,811,072.80/1,259,716,609.20 = 576,783,207.20/x - Step 3: Cross multiply
839,811,072.80x = 1,259,716,609.20 × 576,783,207.20 - Step 4: Simplify right side
839,811,072.80x = 726,583,386,017,485,056 - Step 5: Solve for x
x = 726,583,386,017,485,056/839,811,072.80 - Step 6: Final answer
x = 865,174,810.80
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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.