Finding the Fourth Proportional to 509,972.20, 764,958.30 and 421,325.80
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Solution
The fourth proportional to 509,972.20, 764,958.30 and 421,325.80 is: 631,988.70
Step by Step Solution
- Step 1: Write the proportion equation
509,972.20 : 764,958.30 = 421,325.80 : x - Step 2: Convert to fraction form
509,972.20/764,958.30 = 421,325.80/x - Step 3: Cross multiply
509,972.20x = 764,958.30 × 421,325.80 - Step 4: Simplify right side
509,972.20x = 322,296,667,714.14 - Step 5: Solve for x
x = 322,296,667,714.14/509,972.20 - Step 6: Final answer
x = 631,988.70
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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.