Finding the Fourth Proportional to 431,599.12, 644,202.74 and 405,005.20
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Solution
The fourth proportional to 431,599.12, 644,202.74 and 405,005.20 is: 604,508.78
Step by Step Solution
- Step 1: Write the proportion equation
431,599.12 : 644,202.74 = 405,005.20 : x - Step 2: Convert to fraction form
431,599.12/644,202.74 = 405,005.20/x - Step 3: Cross multiply
431,599.12x = 644,202.74 × 405,005.20 - Step 4: Simplify right side
431,599.12x = 260,905,459,554.25 - Step 5: Solve for x
x = 260,905,459,554.25/431,599.12 - Step 6: Final answer
x = 604,508.78
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.