Finding the Fourth Proportional to 832,772,040.40, 1,247,646,406.20 and 678,583,291.60
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Solution
The fourth proportional to 832,772,040.40, 1,247,646,406.20 and 678,583,291.60 is: 1,016,643,167.64
Step by Step Solution
- Step 1: Write the proportion equation
832,772,040.40 : 1,247,646,406.20 = 678,583,291.60 : x - Step 2: Convert to fraction form
832,772,040.40/1,247,646,406.20 = 678,583,291.60/x - Step 3: Cross multiply
832,772,040.40x = 1,247,646,406.20 × 678,583,291.60 - Step 4: Simplify right side
832,772,040.40x = 846,632,005,072,106,752 - Step 5: Solve for x
x = 846,632,005,072,106,752/832,772,040.40 - Step 6: Final answer
x = 1,016,643,167.64
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Double scale
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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.