Finding the Fourth Proportional to 1,420,688.90, 2,129,704.74 and 521,889.30
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Solution
The fourth proportional to 1,420,688.90, 2,129,704.74 and 521,889.30 is: 782,345.88
Step by Step Solution
- Step 1: Write the proportion equation
1,420,688.90 : 2,129,704.74 = 521,889.30 : x - Step 2: Convert to fraction form
1,420,688.90/2,129,704.74 = 521,889.30/x - Step 3: Cross multiply
1,420,688.90x = 2,129,704.74 × 521,889.30 - Step 4: Simplify right side
1,420,688.90x = 1,111,470,115,965.28 - Step 5: Solve for x
x = 1,111,470,115,965.28/1,420,688.90 - Step 6: Final answer
x = 782,345.88
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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.