Finding the Fourth Proportional to 390,558.98, 538,945.97 and 218,447.13
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Solution
The fourth proportional to 390,558.98, 538,945.97 and 218,447.13 is: 301,442.82
Step by Step Solution
- Step 1: Write the proportion equation
390,558.98 : 538,945.97 = 218,447.13 : x - Step 2: Convert to fraction form
390,558.98/538,945.97 = 218,447.13/x - Step 3: Cross multiply
390,558.98x = 538,945.97 × 218,447.13 - Step 4: Simplify right side
390,558.98x = 117,731,199,497.57 - Step 5: Solve for x
x = 117,731,199,497.57/390,558.98 - Step 6: Final answer
x = 301,442.82
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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.