Finding the Fourth Proportional to 438,990.13, 658,860.18 and 312,938.74
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Solution
The fourth proportional to 438,990.13, 658,860.18 and 312,938.74 is: 469,675.42
Step by Step Solution
- Step 1: Write the proportion equation
438,990.13 : 658,860.18 = 312,938.74 : x - Step 2: Convert to fraction form
438,990.13/658,860.18 = 312,938.74/x - Step 3: Cross multiply
438,990.13x = 658,860.18 × 312,938.74 - Step 4: Simplify right side
438,990.13x = 206,182,874,215.43 - Step 5: Solve for x
x = 206,182,874,215.43/438,990.13 - Step 6: Final answer
x = 469,675.42
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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.