Finding the Fourth Proportional to 389,958.92, 538,153.14 and 239,139.08
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Solution
The fourth proportional to 389,958.92, 538,153.14 and 239,139.08 is: 330,017.96
Step by Step Solution
- Step 1: Write the proportion equation
389,958.92 : 538,153.14 = 239,139.08 : x - Step 2: Convert to fraction form
389,958.92/538,153.14 = 239,139.08/x - Step 3: Cross multiply
389,958.92x = 538,153.14 × 239,139.08 - Step 4: Simplify right side
389,958.92x = 128,693,446,798.71 - Step 5: Solve for x
x = 128,693,446,798.71/389,958.92 - Step 6: Final answer
x = 330,017.96
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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.