Finding the Fourth Proportional to 221,400.28, 305,510.25 and 129,506.05
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Solution
The fourth proportional to 221,400.28, 305,510.25 and 129,506.05 is: 178,705.40
Step by Step Solution
- Step 1: Write the proportion equation
221,400.28 : 305,510.25 = 129,506.05 : x - Step 2: Convert to fraction form
221,400.28/305,510.25 = 129,506.05/x - Step 3: Cross multiply
221,400.28x = 305,510.25 × 129,506.05 - Step 4: Simplify right side
221,400.28x = 39,565,424,948.24 - Step 5: Solve for x
x = 39,565,424,948.24/221,400.28 - Step 6: Final answer
x = 178,705.40
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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.