Finding the Fourth Proportional to 390,402.96, 538,756.36 and 211,554.96
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Solution
The fourth proportional to 390,402.96, 538,756.36 and 211,554.96 is: 291,945.99
Step by Step Solution
- Step 1: Write the proportion equation
390,402.96 : 538,756.36 = 211,554.96 : x - Step 2: Convert to fraction form
390,402.96/538,756.36 = 211,554.96/x - Step 3: Cross multiply
390,402.96x = 538,756.36 × 211,554.96 - Step 4: Simplify right side
390,402.96x = 113,976,580,189.55 - Step 5: Solve for x
x = 113,976,580,189.55/390,402.96 - Step 6: Final answer
x = 291,945.99
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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.