Finding the Fourth Proportional to 691,092,231.70, 1,036,638,347.55 and 432,811,905.70
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Solution
The fourth proportional to 691,092,231.70, 1,036,638,347.55 and 432,811,905.70 is: 649,217,858.55
Step by Step Solution
- Step 1: Write the proportion equation
691,092,231.70 : 1,036,638,347.55 = 432,811,905.70 : x - Step 2: Convert to fraction form
691,092,231.70/1,036,638,347.55 = 432,811,905.70/x - Step 3: Cross multiply
691,092,231.70x = 1,036,638,347.55 × 432,811,905.70 - Step 4: Simplify right side
691,092,231.70x = 448,669,418,724,814,400 - Step 5: Solve for x
x = 448,669,418,724,814,400/691,092,231.70 - Step 6: Final answer
x = 649,217,858.55
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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.