Finding the Fourth Proportional to 499,643.11, 689,313.86 and 318,322.58
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Solution
The fourth proportional to 499,643.11, 689,313.86 and 318,322.58 is: 439,161.80
Step by Step Solution
- Step 1: Write the proportion equation
499,643.11 : 689,313.86 = 318,322.58 : x - Step 2: Convert to fraction form
499,643.11/689,313.86 = 318,322.58/x - Step 3: Cross multiply
499,643.11x = 689,313.86 × 318,322.58 - Step 4: Simplify right side
499,643.11x = 219,424,166,344.96 - Step 5: Solve for x
x = 219,424,166,344.96/499,643.11 - Step 6: Final answer
x = 439,161.80
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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.