Finding the Fourth Proportional to 979,779,863.20, 1,469,669,794.80 and 289,625,648.80
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Solution
The fourth proportional to 979,779,863.20, 1,469,669,794.80 and 289,625,648.80 is: 434,438,473.20
Step by Step Solution
- Step 1: Write the proportion equation
979,779,863.20 : 1,469,669,794.80 = 289,625,648.80 : x - Step 2: Convert to fraction form
979,779,863.20/1,469,669,794.80 = 289,625,648.80/x - Step 3: Cross multiply
979,779,863.20x = 1,469,669,794.80 × 289,625,648.80 - Step 4: Simplify right side
979,779,863.20x = 425,654,067,840,712,896 - Step 5: Solve for x
x = 425,654,067,840,712,896/979,779,863.20 - Step 6: Final answer
x = 434,438,473.20
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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.