Finding the Fourth Proportional to 289,030.12, 432,984.36 and 212,990.72
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Solution
The fourth proportional to 289,030.12, 432,984.36 and 212,990.72 is: 319,072.80
Step by Step Solution
- Step 1: Write the proportion equation
289,030.12 : 432,984.36 = 212,990.72 : x - Step 2: Convert to fraction form
289,030.12/432,984.36 = 212,990.72/x - Step 3: Cross multiply
289,030.12x = 432,984.36 × 212,990.72 - Step 4: Simplify right side
289,030.12x = 92,221,650,585.14 - Step 5: Solve for x
x = 92,221,650,585.14/289,030.12 - Step 6: Final answer
x = 319,072.80
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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.