Finding the Fourth Proportional to 1,331,721.92, 1,997,781.76 and 490,209.68
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Solution
The fourth proportional to 1,331,721.92, 1,997,781.76 and 490,209.68 is: 735,387.73
Step by Step Solution
- Step 1: Write the proportion equation
1,331,721.92 : 1,997,781.76 = 490,209.68 : x - Step 2: Convert to fraction form
1,331,721.92/1,997,781.76 = 490,209.68/x - Step 3: Cross multiply
1,331,721.92x = 1,997,781.76 × 490,209.68 - Step 4: Simplify right side
1,331,721.92x = 979,331,957,279.44 - Step 5: Solve for x
x = 979,331,957,279.44/1,331,721.92 - Step 6: Final answer
x = 735,387.73
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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.