Finding the Fourth Proportional to 390,540.88, 538,959.12 and 216,113.08
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Solution
The fourth proportional to 390,540.88, 538,959.12 and 216,113.08 is: 298,243.08
Step by Step Solution
- Step 1: Write the proportion equation
390,540.88 : 538,959.12 = 216,113.08 : x - Step 2: Convert to fraction form
390,540.88/538,959.12 = 216,113.08/x - Step 3: Cross multiply
390,540.88x = 538,959.12 × 216,113.08 - Step 4: Simplify right side
390,540.88x = 116,476,115,417.29 - Step 5: Solve for x
x = 116,476,115,417.29/390,540.88 - Step 6: Final answer
x = 298,243.08
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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.