Finding the Fourth Proportional to 315,316.80, 435,121.20 and 172,075.68
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Solution
The fourth proportional to 315,316.80, 435,121.20 and 172,075.68 is: 237,455.72
Step by Step Solution
- Step 1: Write the proportion equation
315,316.80 : 435,121.20 = 172,075.68 : x - Step 2: Convert to fraction form
315,316.80/435,121.20 = 172,075.68/x - Step 3: Cross multiply
315,316.80x = 435,121.20 × 172,075.68 - Step 4: Simplify right side
315,316.80x = 74,873,776,372.42 - Step 5: Solve for x
x = 74,873,776,372.42/315,316.80 - Step 6: Final answer
x = 237,455.72
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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.