Finding the Fourth Proportional to 608,409.10, 839,716.88 and 390,889.70
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Solution
The fourth proportional to 608,409.10, 839,716.88 and 390,889.70 is: 539,499.95
Step by Step Solution
- Step 1: Write the proportion equation
608,409.10 : 839,716.88 = 390,889.70 : x - Step 2: Convert to fraction form
608,409.10/839,716.88 = 390,889.70/x - Step 3: Cross multiply
608,409.10x = 839,716.88 × 390,889.70 - Step 4: Simplify right side
608,409.10x = 328,236,679,308.14 - Step 5: Solve for x
x = 328,236,679,308.14/608,409.10 - Step 6: Final answer
x = 539,499.95
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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.