Finding the Fourth Proportional to 457,680.80, 686,521.20 and 142,135.20
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Solution
The fourth proportional to 457,680.80, 686,521.20 and 142,135.20 is: 213,202.80
Step by Step Solution
- Step 1: Write the proportion equation
457,680.80 : 686,521.20 = 142,135.20 : x - Step 2: Convert to fraction form
457,680.80/686,521.20 = 142,135.20/x - Step 3: Cross multiply
457,680.80x = 686,521.20 × 142,135.20 - Step 4: Simplify right side
457,680.80x = 97,578,828,066.24 - Step 5: Solve for x
x = 97,578,828,066.24/457,680.80 - Step 6: Final answer
x = 213,202.80
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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.