Finding the Fourth Proportional to 432,020.76, 647,974.26 and 128,408.44
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Solution
The fourth proportional to 432,020.76, 647,974.26 and 128,408.44 is: 192,595.75
Step by Step Solution
- Step 1: Write the proportion equation
432,020.76 : 647,974.26 = 128,408.44 : x - Step 2: Convert to fraction form
432,020.76/647,974.26 = 128,408.44/x - Step 3: Cross multiply
432,020.76x = 647,974.26 × 128,408.44 - Step 4: Simplify right side
432,020.76x = 83,205,363,886.75 - Step 5: Solve for x
x = 83,205,363,886.75/432,020.76 - Step 6: Final answer
x = 192,595.75
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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.