Finding the Fourth Proportional to 318,938.60, 478,425.11 and 129,370.65
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Solution
The fourth proportional to 318,938.60, 478,425.11 and 129,370.65 is: 194,062.96
Step by Step Solution
- Step 1: Write the proportion equation
318,938.60 : 478,425.11 = 129,370.65 : x - Step 2: Convert to fraction form
318,938.60/478,425.11 = 129,370.65/x - Step 3: Cross multiply
318,938.60x = 478,425.11 × 129,370.65 - Step 4: Simplify right side
318,938.60x = 61,894,166,810.17 - Step 5: Solve for x
x = 61,894,166,810.17/318,938.60 - Step 6: Final answer
x = 194,062.96
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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.