Finding the Fourth Proportional to 389,959.80, 547,124.70 and 389,959.80
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Solution
The fourth proportional to 389,959.80, 547,124.70 and 389,959.80 is: 547,124.70
Step by Step Solution
- Step 1: Write the proportion equation
389,959.80 : 547,124.70 = 389,959.80 : x - Step 2: Convert to fraction form
389,959.80/547,124.70 = 389,959.80/x - Step 3: Cross multiply
389,959.80x = 547,124.70 × 389,959.80 - Step 4: Simplify right side
389,959.80x = 213,356,638,587.06 - Step 5: Solve for x
x = 213,356,638,587.06/389,959.80 - Step 6: Final answer
x = 547,124.70
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Why These Related Problems?
These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.