Finding the Fourth Proportional to 718,312.68, 991,315.80 and 396,021.96
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Solution
The fourth proportional to 718,312.68, 991,315.80 and 396,021.96 is: 546,534.73
Step by Step Solution
- Step 1: Write the proportion equation
718,312.68 : 991,315.80 = 396,021.96 : x - Step 2: Convert to fraction form
718,312.68/991,315.80 = 396,021.96/x - Step 3: Cross multiply
718,312.68x = 991,315.80 × 396,021.96 - Step 4: Simplify right side
718,312.68x = 392,582,826,094.97 - Step 5: Solve for x
x = 392,582,826,094.97/718,312.68 - Step 6: Final answer
x = 546,534.73
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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.