Finding the Fourth Proportional to 1,387,722.12, 1,915,129.68 and 843,767.88
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Solution
The fourth proportional to 1,387,722.12, 1,915,129.68 and 843,767.88 is: 1,164,444.15
Step by Step Solution
- Step 1: Write the proportion equation
1,387,722.12 : 1,915,129.68 = 843,767.88 : x - Step 2: Convert to fraction form
1,387,722.12/1,915,129.68 = 843,767.88/x - Step 3: Cross multiply
1,387,722.12x = 1,915,129.68 × 843,767.88 - Step 4: Simplify right side
1,387,722.12x = 1,615,924,910,018.68 - Step 5: Solve for x
x = 1,615,924,910,018.68/1,387,722.12 - Step 6: Final answer
x = 1,164,444.15
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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.