Finding the Fourth Proportional to 6,438,528,437.20, 9,657,792,655.80 and 3,989,648,309.20
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Solution
The fourth proportional to 6,438,528,437.20, 9,657,792,655.80 and 3,989,648,309.20 is: 5,984,472,463.80
Step by Step Solution
- Step 1: Write the proportion equation
6,438,528,437.20 : 9,657,792,655.80 = 3,989,648,309.20 : x - Step 2: Convert to fraction form
6,438,528,437.20/9,657,792,655.80 = 3,989,648,309.20/x - Step 3: Cross multiply
6,438,528,437.20x = 9,657,792,655.80 × 3,989,648,309.20 - Step 4: Simplify right side
6,438,528,437.20x = 38,531,196,139,816,640,512 - Step 5: Solve for x
x = 38,531,196,139,816,640,512/6,438,528,437.20 - Step 6: Final answer
x = 5,984,472,463.80
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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.