Finding the Fourth Proportional to 678,858.08, 936,720.12 and 392,322.88
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Solution
The fourth proportional to 678,858.08, 936,720.12 and 392,322.88 is: 541,345.45
Step by Step Solution
- Step 1: Write the proportion equation
678,858.08 : 936,720.12 = 392,322.88 : x - Step 2: Convert to fraction form
678,858.08/936,720.12 = 392,322.88/x - Step 3: Cross multiply
678,858.08x = 936,720.12 × 392,322.88 - Step 4: Simplify right side
678,858.08x = 367,496,735,232.35 - Step 5: Solve for x
x = 367,496,735,232.35/678,858.08 - Step 6: Final answer
x = 541,345.45
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.