Finding the Fourth Proportional to 1,121,712.74, 1,547,955.57 and 612,415.10
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Solution
The fourth proportional to 1,121,712.74, 1,547,955.57 and 612,415.10 is: 845,128.46
Step by Step Solution
- Step 1: Write the proportion equation
1,121,712.74 : 1,547,955.57 = 612,415.10 : x - Step 2: Convert to fraction form
1,121,712.74/1,547,955.57 = 612,415.10/x - Step 3: Cross multiply
1,121,712.74x = 1,547,955.57 × 612,415.10 - Step 4: Simplify right side
1,121,712.74x = 947,991,365,197.11 - Step 5: Solve for x
x = 947,991,365,197.11/1,121,712.74 - Step 6: Final answer
x = 845,128.46
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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.