Finding the Fourth Proportional to 678,844.83, 936,701.84 and 392,309.63
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Solution
The fourth proportional to 678,844.83, 936,701.84 and 392,309.63 is: 541,327.17
Step by Step Solution
- Step 1: Write the proportion equation
678,844.83 : 936,701.84 = 392,309.63 : x - Step 2: Convert to fraction form
678,844.83/936,701.84 = 392,309.63/x - Step 3: Cross multiply
678,844.83x = 936,701.84 × 392,309.63 - Step 4: Simplify right side
678,844.83x = 367,477,149,873.87 - Step 5: Solve for x
x = 367,477,149,873.87/678,844.83 - Step 6: Final answer
x = 541,327.17
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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.