Finding the Fourth Proportional to 1,347,683,423.70, 2,021,525,135.55 and 378,335,039.70
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Solution
The fourth proportional to 1,347,683,423.70, 2,021,525,135.55 and 378,335,039.70 is: 567,502,559.55
Step by Step Solution
- Step 1: Write the proportion equation
1,347,683,423.70 : 2,021,525,135.55 = 378,335,039.70 : x - Step 2: Convert to fraction form
1,347,683,423.70/2,021,525,135.55 = 378,335,039.70/x - Step 3: Cross multiply
1,347,683,423.70x = 2,021,525,135.55 × 378,335,039.70 - Step 4: Simplify right side
1,347,683,423.70x = 764,813,792,412,857,088 - Step 5: Solve for x
x = 764,813,792,412,857,088/1,347,683,423.70 - Step 6: Final answer
x = 567,502,559.55
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Double scale
Find fourth proportional to 1,347,683,424.70, 2,021,525,137.05 and 378,335,040.70
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.