Finding the Fourth Proportional to 1,420,990.80, 1,960,964.30 and 776,415.62
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Solution
The fourth proportional to 1,420,990.80, 1,960,964.30 and 776,415.62 is: 1,071,451.91
Step by Step Solution
- Step 1: Write the proportion equation
1,420,990.80 : 1,960,964.30 = 776,415.62 : x - Step 2: Convert to fraction form
1,420,990.80/1,960,964.30 = 776,415.62/x - Step 3: Cross multiply
1,420,990.80x = 1,960,964.30 × 776,415.62 - Step 4: Simplify right side
1,420,990.80x = 1,522,523,312,782.37 - Step 5: Solve for x
x = 1,522,523,312,782.37/1,420,990.80 - Step 6: Final answer
x = 1,071,451.91
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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.