Finding the Fourth Proportional to 390,193.88, 538,511.36 and 220,438.94
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Solution
The fourth proportional to 390,193.88, 538,511.36 and 220,438.94 is: 304,230.48
Step by Step Solution
- Step 1: Write the proportion equation
390,193.88 : 538,511.36 = 220,438.94 : x - Step 2: Convert to fraction form
390,193.88/538,511.36 = 220,438.94/x - Step 3: Cross multiply
390,193.88x = 538,511.36 × 220,438.94 - Step 4: Simplify right side
390,193.88x = 118,708,869,581.61 - Step 5: Solve for x
x = 118,708,869,581.61/390,193.88 - Step 6: Final answer
x = 304,230.48
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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.