Finding the Fourth Proportional to 578,686.40, 867,511.20 and 379,102.40
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Solution
The fourth proportional to 578,686.40, 867,511.20 and 379,102.40 is: 568,313.99
Step by Step Solution
- Step 1: Write the proportion equation
578,686.40 : 867,511.20 = 379,102.40 : x - Step 2: Convert to fraction form
578,686.40/867,511.20 = 379,102.40/x - Step 3: Cross multiply
578,686.40x = 867,511.20 × 379,102.40 - Step 4: Simplify right side
578,686.40x = 328,875,577,946.88 - Step 5: Solve for x
x = 328,875,577,946.88/578,686.40 - Step 6: Final answer
x = 568,313.99
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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.