Finding the Fourth Proportional to 1,279,486.08, 1,919,231.28 and 438,045.12
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Solution
The fourth proportional to 1,279,486.08, 1,919,231.28 and 438,045.12 is: 657,068.42
Step by Step Solution
- Step 1: Write the proportion equation
1,279,486.08 : 1,919,231.28 = 438,045.12 : x - Step 2: Convert to fraction form
1,279,486.08/1,919,231.28 = 438,045.12/x - Step 3: Cross multiply
1,279,486.08x = 1,919,231.28 × 438,045.12 - Step 4: Simplify right side
1,279,486.08x = 840,709,896,355.35 - Step 5: Solve for x
x = 840,709,896,355.35/1,279,486.08 - Step 6: Final answer
x = 657,068.42
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.