Finding the Fourth Proportional to 390,346.85, 538,653.64 and 218,278.99
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Solution
The fourth proportional to 390,346.85, 538,653.64 and 218,278.99 is: 301,211.02
Step by Step Solution
- Step 1: Write the proportion equation
390,346.85 : 538,653.64 = 218,278.99 : x - Step 2: Convert to fraction form
390,346.85/538,653.64 = 218,278.99/x - Step 3: Cross multiply
390,346.85x = 538,653.64 × 218,278.99 - Step 4: Simplify right side
390,346.85x = 117,576,772,499.02 - Step 5: Solve for x
x = 117,576,772,499.02/390,346.85 - Step 6: Final answer
x = 301,211.02
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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.