Finding the Fourth Proportional to 579,689.80, 869,534.70 and 439,721.80
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Solution
The fourth proportional to 579,689.80, 869,534.70 and 439,721.80 is: 659,582.70
Step by Step Solution
- Step 1: Write the proportion equation
579,689.80 : 869,534.70 = 439,721.80 : x - Step 2: Convert to fraction form
579,689.80/869,534.70 = 439,721.80/x - Step 3: Cross multiply
579,689.80x = 869,534.70 × 439,721.80 - Step 4: Simplify right side
579,689.80x = 382,353,363,446.46 - Step 5: Solve for x
x = 382,353,363,446.46/579,689.80 - Step 6: Final answer
x = 659,582.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.