Finding the Fourth Proportional to 390,147.08, 538,403.64 and 211,299.08
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Solution
The fourth proportional to 390,147.08, 538,403.64 and 211,299.08 is: 291,593.09
Step by Step Solution
- Step 1: Write the proportion equation
390,147.08 : 538,403.64 = 211,299.08 : x - Step 2: Convert to fraction form
390,147.08/538,403.64 = 211,299.08/x - Step 3: Cross multiply
390,147.08x = 538,403.64 × 211,299.08 - Step 4: Simplify right side
390,147.08x = 113,764,193,800.65 - Step 5: Solve for x
x = 113,764,193,800.65/390,147.08 - Step 6: Final answer
x = 291,593.09
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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.