Finding the Fourth Proportional to 513,011.21, 707,943.11 and 280,427.81
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Solution
The fourth proportional to 513,011.21, 707,943.11 and 280,427.81 is: 386,983.62
Step by Step Solution
- Step 1: Write the proportion equation
513,011.21 : 707,943.11 = 280,427.81 : x - Step 2: Convert to fraction form
513,011.21/707,943.11 = 280,427.81/x - Step 3: Cross multiply
513,011.21x = 707,943.11 × 280,427.81 - Step 4: Simplify right side
513,011.21x = 198,526,931,000.04 - Step 5: Solve for x
x = 198,526,931,000.04/513,011.21 - Step 6: Final answer
x = 386,983.62
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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.