Finding the Fourth Proportional to 861,840,312.30, 1,292,760,468.45 and 848,235,422.70
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Solution
The fourth proportional to 861,840,312.30, 1,292,760,468.45 and 848,235,422.70 is: 1,272,353,134.05
Step by Step Solution
- Step 1: Write the proportion equation
861,840,312.30 : 1,292,760,468.45 = 848,235,422.70 : x - Step 2: Convert to fraction form
861,840,312.30/1,292,760,468.45 = 848,235,422.70/x - Step 3: Cross multiply
861,840,312.30x = 1,292,760,468.45 × 848,235,422.70 - Step 4: Simplify right side
861,840,312.30x = 1,096,565,222,405,535,872 - Step 5: Solve for x
x = 1,096,565,222,405,535,872/861,840,312.30 - Step 6: Final answer
x = 1,272,353,134.05
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Double scale
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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.