Finding the Fourth Proportional to 1,187,652.07, 1,638,953.89 and 643,785.67
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Solution
The fourth proportional to 1,187,652.07, 1,638,953.89 and 643,785.67 is: 888,420.99
Step by Step Solution
- Step 1: Write the proportion equation
1,187,652.07 : 1,638,953.89 = 643,785.67 : x - Step 2: Convert to fraction form
1,187,652.07/1,638,953.89 = 643,785.67/x - Step 3: Cross multiply
1,187,652.07x = 1,638,953.89 × 643,785.67 - Step 4: Simplify right side
1,187,652.07x = 1,055,135,028,172.76 - Step 5: Solve for x
x = 1,055,135,028,172.76/1,187,652.07 - Step 6: Final answer
x = 888,420.99
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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.