Finding the Fourth Proportional to 639,576,021.70, 959,364,032.55 and 639,576,021.70
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Solution
The fourth proportional to 639,576,021.70, 959,364,032.55 and 639,576,021.70 is: 959,364,032.55
Step by Step Solution
- Step 1: Write the proportion equation
639,576,021.70 : 959,364,032.55 = 639,576,021.70 : x - Step 2: Convert to fraction form
639,576,021.70/959,364,032.55 = 639,576,021.70/x - Step 3: Cross multiply
639,576,021.70x = 959,364,032.55 × 639,576,021.70 - Step 4: Simplify right side
639,576,021.70x = 613,586,231,300,398,336 - Step 5: Solve for x
x = 613,586,231,300,398,336/639,576,021.70 - Step 6: Final answer
x = 959,364,032.55
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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.