Finding the Fourth Proportional to 1,638,138,879.20, 2,457,208,318.80 and 603,742,116.80
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Solution
The fourth proportional to 1,638,138,879.20, 2,457,208,318.80 and 603,742,116.80 is: 905,613,175.20
Step by Step Solution
- Step 1: Write the proportion equation
1,638,138,879.20 : 2,457,208,318.80 = 603,742,116.80 : x - Step 2: Convert to fraction form
1,638,138,879.20/2,457,208,318.80 = 603,742,116.80/x - Step 3: Cross multiply
1,638,138,879.20x = 2,457,208,318.80 × 603,742,116.80 - Step 4: Simplify right side
1,638,138,879.20x = 1,483,520,151,810,881,280 - Step 5: Solve for x
x = 1,483,520,151,810,881,280/1,638,138,879.20 - Step 6: Final answer
x = 905,613,175.20
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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.