Finding the Fourth Proportional to 319,442.20, 478,779.30 and 132,357.40
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Solution
The fourth proportional to 319,442.20, 478,779.30 and 132,357.40 is: 198,376.99
Step by Step Solution
- Step 1: Write the proportion equation
319,442.20 : 478,779.30 = 132,357.40 : x - Step 2: Convert to fraction form
319,442.20/478,779.30 = 132,357.40/x - Step 3: Cross multiply
319,442.20x = 478,779.30 × 132,357.40 - Step 4: Simplify right side
319,442.20x = 63,369,983,321.82 - Step 5: Solve for x
x = 63,369,983,321.82/319,442.20 - Step 6: Final answer
x = 198,376.99
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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.