Finding the Fourth Proportional to 385,071.28, 531,235.62 and 257,787.88
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Solution
The fourth proportional to 385,071.28, 531,235.62 and 257,787.88 is: 355,638.32
Step by Step Solution
- Step 1: Write the proportion equation
385,071.28 : 531,235.62 = 257,787.88 : x - Step 2: Convert to fraction form
385,071.28/531,235.62 = 257,787.88/x - Step 3: Cross multiply
385,071.28x = 531,235.62 × 257,787.88 - Step 4: Simplify right side
385,071.28x = 136,946,104,260.29 - Step 5: Solve for x
x = 136,946,104,260.29/385,071.28 - Step 6: Final answer
x = 355,638.32
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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.