Finding the Fourth Proportional to 288,510.26, 432,815.20 and 128,642.99
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Solution
The fourth proportional to 288,510.26, 432,815.20 and 128,642.99 is: 192,986.69
Step by Step Solution
- Step 1: Write the proportion equation
288,510.26 : 432,815.20 = 128,642.99 : x - Step 2: Convert to fraction form
288,510.26/432,815.20 = 128,642.99/x - Step 3: Cross multiply
288,510.26x = 432,815.20 × 128,642.99 - Step 4: Simplify right side
288,510.26x = 55,678,638,959.76 - Step 5: Solve for x
x = 55,678,638,959.76/288,510.26 - Step 6: Final answer
x = 192,986.69
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1.5x scale
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.