Finding the Fourth Proportional to 3,978,905.80, 5,968,358.70 and 1,319,513.80
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Solution
The fourth proportional to 3,978,905.80, 5,968,358.70 and 1,319,513.80 is: 1,979,270.70
Step by Step Solution
- Step 1: Write the proportion equation
3,978,905.80 : 5,968,358.70 = 1,319,513.80 : x - Step 2: Convert to fraction form
3,978,905.80/5,968,358.70 = 1,319,513.80/x - Step 3: Cross multiply
3,978,905.80x = 5,968,358.70 × 1,319,513.80 - Step 4: Simplify right side
3,978,905.80x = 7,875,331,668,000.06 - Step 5: Solve for x
x = 7,875,331,668,000.06/3,978,905.80 - Step 6: Final answer
x = 1,979,270.70
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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.