Finding the Fourth Proportional to 420,877.36, 580,638.81 and 310,759.91
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Solution
The fourth proportional to 420,877.36, 580,638.81 and 310,759.91 is: 428,721.71
Step by Step Solution
- Step 1: Write the proportion equation
420,877.36 : 580,638.81 = 310,759.91 : x - Step 2: Convert to fraction form
420,877.36/580,638.81 = 310,759.91/x - Step 3: Cross multiply
420,877.36x = 580,638.81 × 310,759.91 - Step 4: Simplify right side
420,877.36x = 180,439,262,498.06 - Step 5: Solve for x
x = 180,439,262,498.06/420,877.36 - Step 6: Final answer
x = 428,721.71
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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.