Finding the Fourth Proportional to 906,390,138.20, 1,359,585,207.30 and 724,991,610.20
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Solution
The fourth proportional to 906,390,138.20, 1,359,585,207.30 and 724,991,610.20 is: 1,087,487,415.30
Step by Step Solution
- Step 1: Write the proportion equation
906,390,138.20 : 1,359,585,207.30 = 724,991,610.20 : x - Step 2: Convert to fraction form
906,390,138.20/1,359,585,207.30 = 724,991,610.20/x - Step 3: Cross multiply
906,390,138.20x = 1,359,585,207.30 × 724,991,610.20 - Step 4: Simplify right side
906,390,138.20x = 985,687,868,644,527,872 - Step 5: Solve for x
x = 985,687,868,644,527,872/906,390,138.20 - Step 6: Final answer
x = 1,087,487,415.30
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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.