Finding the Fourth Proportional to 645,473.07, 890,785.76 and 358,998.75
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Solution
The fourth proportional to 645,473.07, 890,785.76 and 358,998.75 is: 495,436.58
Step by Step Solution
- Step 1: Write the proportion equation
645,473.07 : 890,785.76 = 358,998.75 : x - Step 2: Convert to fraction form
645,473.07/890,785.76 = 358,998.75/x - Step 3: Cross multiply
645,473.07x = 890,785.76 × 358,998.75 - Step 4: Simplify right side
645,473.07x = 319,790,972,562.81 - Step 5: Solve for x
x = 319,790,972,562.81/645,473.07 - Step 6: Final answer
x = 495,436.58
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1.5x scale
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.