Finding the Fourth Proportional to 1,379,212,821.60, 1,903,354,007.28 and 752,721,457.44
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Solution
The fourth proportional to 1,379,212,821.60, 1,903,354,007.28 and 752,721,457.44 is: 1,038,777,612.81
Step by Step Solution
- Step 1: Write the proportion equation
1,379,212,821.60 : 1,903,354,007.28 = 752,721,457.44 : x - Step 2: Convert to fraction form
1,379,212,821.60/1,903,354,007.28 = 752,721,457.44/x - Step 3: Cross multiply
1,379,212,821.60x = 1,903,354,007.28 × 752,721,457.44 - Step 4: Simplify right side
1,379,212,821.60x = 1,432,695,402,384,066,048 - Step 5: Solve for x
x = 1,432,695,402,384,066,048/1,379,212,821.60 - Step 6: Final answer
x = 1,038,777,612.81
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.