Finding the Fourth Proportional to 712,932,138.30, 1,069,398,207.45 and 687,104,105.70
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Solution
The fourth proportional to 712,932,138.30, 1,069,398,207.45 and 687,104,105.70 is: 1,030,656,158.55
Step by Step Solution
- Step 1: Write the proportion equation
712,932,138.30 : 1,069,398,207.45 = 687,104,105.70 : x - Step 2: Convert to fraction form
712,932,138.30/1,069,398,207.45 = 687,104,105.70/x - Step 3: Cross multiply
712,932,138.30x = 1,069,398,207.45 × 687,104,105.70 - Step 4: Simplify right side
712,932,138.30x = 734,787,898,967,115,392 - Step 5: Solve for x
x = 734,787,898,967,115,392/712,932,138.30 - Step 6: Final answer
x = 1,030,656,158.55
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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.