Finding the Fourth Proportional to 640,121.28, 883,291.68 and 353,624.16
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Solution
The fourth proportional to 640,121.28, 883,291.68 and 353,624.16 is: 487,959.53
Step by Step Solution
- Step 1: Write the proportion equation
640,121.28 : 883,291.68 = 353,624.16 : x - Step 2: Convert to fraction form
640,121.28/883,291.68 = 353,624.16/x - Step 3: Cross multiply
640,121.28x = 883,291.68 × 353,624.16 - Step 4: Simplify right side
640,121.28x = 312,353,278,374.99 - Step 5: Solve for x
x = 312,353,278,374.99/640,121.28 - Step 6: Final answer
x = 487,959.53
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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.