Finding the Fourth Proportional to 257,141.93, 385,638.39 and 77,220.09
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Solution
The fourth proportional to 257,141.93, 385,638.39 and 77,220.09 is: 115,807.76
Step by Step Solution
- Step 1: Write the proportion equation
257,141.93 : 385,638.39 = 77,220.09 : x - Step 2: Convert to fraction form
257,141.93/385,638.39 = 77,220.09/x - Step 3: Cross multiply
257,141.93x = 385,638.39 × 77,220.09 - Step 4: Simplify right side
257,141.93x = 29,779,031,183.26 - Step 5: Solve for x
x = 29,779,031,183.26/257,141.93 - Step 6: Final answer
x = 115,807.76
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.