Finding the Fourth Proportional to 1,986,936.84, 2,742,134.58 and 1,115,752.20
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Solution
The fourth proportional to 1,986,936.84, 2,742,134.58 and 1,115,752.20 is: 1,539,828.86
Step by Step Solution
- Step 1: Write the proportion equation
1,986,936.84 : 2,742,134.58 = 1,115,752.20 : x - Step 2: Convert to fraction form
1,986,936.84/2,742,134.58 = 1,115,752.20/x - Step 3: Cross multiply
1,986,936.84x = 2,742,134.58 × 1,115,752.20 - Step 4: Simplify right side
1,986,936.84x = 3,059,542,690,331.08 - Step 5: Solve for x
x = 3,059,542,690,331.08/1,986,936.84 - Step 6: Final answer
x = 1,539,828.86
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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.