Finding the Fourth Proportional to 221,681.70, 305,601.89 and 157,908.78
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Solution
The fourth proportional to 221,681.70, 305,601.89 and 157,908.78 is: 217,686.99
Step by Step Solution
- Step 1: Write the proportion equation
221,681.70 : 305,601.89 = 157,908.78 : x - Step 2: Convert to fraction form
221,681.70/305,601.89 = 157,908.78/x - Step 3: Cross multiply
221,681.70x = 305,601.89 × 157,908.78 - Step 4: Simplify right side
221,681.70x = 48,257,221,615.59 - Step 5: Solve for x
x = 48,257,221,615.59/221,681.70 - Step 6: Final answer
x = 217,686.99
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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.