Finding the Fourth Proportional to 286,921.64, 395,936.16 and 157,857.68
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Solution
The fourth proportional to 286,921.64, 395,936.16 and 157,857.68 is: 217,834.96
Step by Step Solution
- Step 1: Write the proportion equation
286,921.64 : 395,936.16 = 157,857.68 : x - Step 2: Convert to fraction form
286,921.64/395,936.16 = 157,857.68/x - Step 3: Cross multiply
286,921.64x = 395,936.16 × 157,857.68 - Step 4: Simplify right side
286,921.64x = 62,501,563,645.71 - Step 5: Solve for x
x = 62,501,563,645.71/286,921.64 - Step 6: Final answer
x = 217,834.96
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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.