Finding the Fourth Proportional to 384,878.13, 531,122.63 and 215,128.05
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Solution
The fourth proportional to 384,878.13, 531,122.63 and 215,128.05 is: 296,871.57
Step by Step Solution
- Step 1: Write the proportion equation
384,878.13 : 531,122.63 = 215,128.05 : x - Step 2: Convert to fraction form
384,878.13/531,122.63 = 215,128.05/x - Step 3: Cross multiply
384,878.13x = 531,122.63 × 215,128.05 - Step 4: Simplify right side
384,878.13x = 114,259,374,627.13 - Step 5: Solve for x
x = 114,259,374,627.13/384,878.13 - Step 6: Final answer
x = 296,871.57
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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.