Finding the Fourth Proportional to 1,425,564.28, 2,138,665.50 and 478,909.12
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Solution
The fourth proportional to 1,425,564.28, 2,138,665.50 and 478,909.12 is: 718,470.87
Step by Step Solution
- Step 1: Write the proportion equation
1,425,564.28 : 2,138,665.50 = 478,909.12 : x - Step 2: Convert to fraction form
1,425,564.28/2,138,665.50 = 478,909.12/x - Step 3: Cross multiply
1,425,564.28x = 2,138,665.50 × 478,909.12 - Step 4: Simplify right side
1,425,564.28x = 1,024,226,412,579.36 - Step 5: Solve for x
x = 1,024,226,412,579.36/1,425,564.28 - Step 6: Final answer
x = 718,470.87
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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.