Finding the Fourth Proportional to 691,092,071.70, 1,036,638,107.55 and 432,811,745.70
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Solution
The fourth proportional to 691,092,071.70, 1,036,638,107.55 and 432,811,745.70 is: 649,217,618.55
Step by Step Solution
- Step 1: Write the proportion equation
691,092,071.70 : 1,036,638,107.55 = 432,811,745.70 : x - Step 2: Convert to fraction form
691,092,071.70/1,036,638,107.55 = 432,811,745.70/x - Step 3: Cross multiply
691,092,071.70x = 1,036,638,107.55 × 432,811,745.70 - Step 4: Simplify right side
691,092,071.70x = 448,669,148,987,859,840 - Step 5: Solve for x
x = 448,669,148,987,859,840/691,092,071.70 - Step 6: Final answer
x = 649,217,618.55
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Double scale
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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.