Finding the Fourth Proportional to 390,336.11, 538,456.05 and 237,421.07
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Solution
The fourth proportional to 390,336.11, 538,456.05 and 237,421.07 is: 327,514.69
Step by Step Solution
- Step 1: Write the proportion equation
390,336.11 : 538,456.05 = 237,421.07 : x - Step 2: Convert to fraction form
390,336.11/538,456.05 = 237,421.07/x - Step 3: Cross multiply
390,336.11x = 538,456.05 × 237,421.07 - Step 4: Simplify right side
390,336.11x = 127,840,811,538.97 - Step 5: Solve for x
x = 127,840,811,538.97/390,336.11 - Step 6: Final answer
x = 327,514.69
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1.5x scale
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.