Finding the Fourth Proportional to 1,115,908.13, 1,540,235.70 and 686,572.70
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Solution
The fourth proportional to 1,115,908.13, 1,540,235.70 and 686,572.70 is: 947,644.12
Step by Step Solution
- Step 1: Write the proportion equation
1,115,908.13 : 1,540,235.70 = 686,572.70 : x - Step 2: Convert to fraction form
1,115,908.13/1,540,235.70 = 686,572.70/x - Step 3: Cross multiply
1,115,908.13x = 1,540,235.70 × 686,572.70 - Step 4: Simplify right side
1,115,908.13x = 1,057,483,783,185.39 - Step 5: Solve for x
x = 1,057,483,783,185.39/1,115,908.13 - Step 6: Final answer
x = 947,644.12
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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.