Finding the Fourth Proportional to 1,281,111.24, 1,921,746.11 and 428,259.63
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Solution
The fourth proportional to 1,281,111.24, 1,921,746.11 and 428,259.63 is: 642,415.94
Step by Step Solution
- Step 1: Write the proportion equation
1,281,111.24 : 1,921,746.11 = 428,259.63 : x - Step 2: Convert to fraction form
1,281,111.24/1,921,746.11 = 428,259.63/x - Step 3: Cross multiply
1,281,111.24x = 1,921,746.11 × 428,259.63 - Step 4: Simplify right side
1,281,111.24x = 823,006,275,881.24 - Step 5: Solve for x
x = 823,006,275,881.24/1,281,111.24 - Step 6: Final answer
x = 642,415.94
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.