Finding the Fourth Proportional to 645,438.24, 890,636.40 and 358,912.08
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Solution
The fourth proportional to 645,438.24, 890,636.40 and 358,912.08 is: 495,260.65
Step by Step Solution
- Step 1: Write the proportion equation
645,438.24 : 890,636.40 = 358,912.08 : x - Step 2: Convert to fraction form
645,438.24/890,636.40 = 358,912.08/x - Step 3: Cross multiply
645,438.24x = 890,636.40 × 358,912.08 - Step 4: Simplify right side
645,438.24x = 319,660,162,847.71 - Step 5: Solve for x
x = 319,660,162,847.71/645,438.24 - Step 6: Final answer
x = 495,260.65
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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.