Finding the Fourth Proportional to 1,242,170,214.23, 1,714,167,305.87 and 685,253,113.67
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Solution
The fourth proportional to 1,242,170,214.23, 1,714,167,305.87 and 685,253,113.67 is: 945,634,076.75
Step by Step Solution
- Step 1: Write the proportion equation
1,242,170,214.23 : 1,714,167,305.87 = 685,253,113.67 : x - Step 2: Convert to fraction form
1,242,170,214.23/1,714,167,305.87 = 685,253,113.67/x - Step 3: Cross multiply
1,242,170,214.23x = 1,714,167,305.87 × 685,253,113.67 - Step 4: Simplify right side
1,242,170,214.23x = 1,174,638,483,699,591,936 - Step 5: Solve for x
x = 1,174,638,483,699,591,936/1,242,170,214.23 - Step 6: Final answer
x = 945,634,076.75
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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.