Finding the Fourth Proportional to 1,455,445,092.80, 2,183,167,639.20 and 420,339,742.40
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Solution
The fourth proportional to 1,455,445,092.80, 2,183,167,639.20 and 420,339,742.40 is: 630,509,613.60
Step by Step Solution
- Step 1: Write the proportion equation
1,455,445,092.80 : 2,183,167,639.20 = 420,339,742.40 : x - Step 2: Convert to fraction form
1,455,445,092.80/2,183,167,639.20 = 420,339,742.40/x - Step 3: Cross multiply
1,455,445,092.80x = 2,183,167,639.20 × 420,339,742.40 - Step 4: Simplify right side
1,455,445,092.80x = 917,672,123,077,344,000 - Step 5: Solve for x
x = 917,672,123,077,344,000/1,455,445,092.80 - Step 6: Final answer
x = 630,509,613.60
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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.