Finding the Fourth Proportional to 1,690,205.12, 2,332,485.12 and 915,835.36
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Solution
The fourth proportional to 1,690,205.12, 2,332,485.12 and 915,835.36 is: 1,263,853.91
Step by Step Solution
- Step 1: Write the proportion equation
1,690,205.12 : 2,332,485.12 = 915,835.36 : x - Step 2: Convert to fraction form
1,690,205.12/2,332,485.12 = 915,835.36/x - Step 3: Cross multiply
1,690,205.12x = 2,332,485.12 × 915,835.36 - Step 4: Simplify right side
1,690,205.12x = 2,136,172,349,569.84 - Step 5: Solve for x
x = 2,136,172,349,569.84/1,690,205.12 - Step 6: Final answer
x = 1,263,853.91
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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.