Finding the Fourth Proportional to 667,639.24, 921,342.67 and 391,943.13
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Solution
The fourth proportional to 667,639.24, 921,342.67 and 391,943.13 is: 540,881.82
Step by Step Solution
- Step 1: Write the proportion equation
667,639.24 : 921,342.67 = 391,943.13 : x - Step 2: Convert to fraction form
667,639.24/921,342.67 = 391,943.13/x - Step 3: Cross multiply
667,639.24x = 921,342.67 × 391,943.13 - Step 4: Simplify right side
667,639.24x = 361,113,925,447.46 - Step 5: Solve for x
x = 361,113,925,447.46/667,639.24 - Step 6: Final answer
x = 540,881.82
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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.