Finding the Fourth Proportional to 1,121,615.79, 1,547,918.15 and 638,201.31
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Solution
The fourth proportional to 1,121,615.79, 1,547,918.15 and 638,201.31 is: 880,768.08
Step by Step Solution
- Step 1: Write the proportion equation
1,121,615.79 : 1,547,918.15 = 638,201.31 : x - Step 2: Convert to fraction form
1,121,615.79/1,547,918.15 = 638,201.31/x - Step 3: Cross multiply
1,121,615.79x = 1,547,918.15 × 638,201.31 - Step 4: Simplify right side
1,121,615.79x = 987,883,387,911.77 - Step 5: Solve for x
x = 987,883,387,911.77/1,121,615.79 - Step 6: Final answer
x = 880,768.08
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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.