Finding the Fourth Proportional to 390,173.13, 538,482.68 and 220,418.19
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Solution
The fourth proportional to 390,173.13, 538,482.68 and 220,418.19 is: 304,201.82
Step by Step Solution
- Step 1: Write the proportion equation
390,173.13 : 538,482.68 = 220,418.19 : x - Step 2: Convert to fraction form
390,173.13/538,482.68 = 220,418.19/x - Step 3: Cross multiply
390,173.13x = 538,482.68 × 220,418.19 - Step 4: Simplify right side
390,173.13x = 118,691,377,671.95 - Step 5: Solve for x
x = 118,691,377,671.95/390,173.13 - Step 6: Final answer
x = 304,201.82
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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.