Finding the Fourth Proportional to 860,619.84, 1,187,638.50 and 478,638.42
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Solution
The fourth proportional to 860,619.84, 1,187,638.50 and 478,638.42 is: 660,511.63
Step by Step Solution
- Step 1: Write the proportion equation
860,619.84 : 1,187,638.50 = 478,638.42 : x - Step 2: Convert to fraction form
860,619.84/1,187,638.50 = 478,638.42/x - Step 3: Cross multiply
860,619.84x = 1,187,638.50 × 478,638.42 - Step 4: Simplify right side
860,619.84x = 568,449,415,171.17 - Step 5: Solve for x
x = 568,449,415,171.17/860,619.84 - Step 6: Final answer
x = 660,511.63
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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.