Finding the Fourth Proportional to 390,069.75, 538,296.27 and 211,221.75
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Solution
The fourth proportional to 390,069.75, 538,296.27 and 211,221.75 is: 291,486.02
Step by Step Solution
- Step 1: Write the proportion equation
390,069.75 : 538,296.27 = 211,221.75 : x - Step 2: Convert to fraction form
390,069.75/538,296.27 = 211,221.75/x - Step 3: Cross multiply
390,069.75x = 538,296.27 × 211,221.75 - Step 4: Simplify right side
390,069.75x = 113,699,880,167.87 - Step 5: Solve for x
x = 113,699,880,167.87/390,069.75 - Step 6: Final answer
x = 291,486.02
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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.