Finding the Fourth Proportional to 1,117,704,883.20, 1,676,557,324.80 and 390,617,779.20
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Solution
The fourth proportional to 1,117,704,883.20, 1,676,557,324.80 and 390,617,779.20 is: 585,926,668.80
Step by Step Solution
- Step 1: Write the proportion equation
1,117,704,883.20 : 1,676,557,324.80 = 390,617,779.20 : x - Step 2: Convert to fraction form
1,117,704,883.20/1,676,557,324.80 = 390,617,779.20/x - Step 3: Cross multiply
1,117,704,883.20x = 1,676,557,324.80 × 390,617,779.20 - Step 4: Simplify right side
1,117,704,883.20x = 654,893,098,914,868,992 - Step 5: Solve for x
x = 654,893,098,914,868,992/1,117,704,883.20 - Step 6: Final answer
x = 585,926,668.80
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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.