Finding the Fourth Proportional to 663,643.80, 915,829.36 and 361,837.80
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Solution
The fourth proportional to 663,643.80, 915,829.36 and 361,837.80 is: 499,336.66
Step by Step Solution
- Step 1: Write the proportion equation
663,643.80 : 915,829.36 = 361,837.80 : x - Step 2: Convert to fraction form
663,643.80/915,829.36 = 361,837.80/x - Step 3: Cross multiply
663,643.80x = 915,829.36 × 361,837.80 - Step 4: Simplify right side
663,643.80x = 331,381,680,797.81 - Step 5: Solve for x
x = 331,381,680,797.81/663,643.80 - Step 6: Final answer
x = 499,336.66
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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.