Finding the Fourth Proportional to 645,228.36, 890,437.98 and 354,862.38
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Solution
The fourth proportional to 645,228.36, 890,437.98 and 354,862.38 is: 489,722.65
Step by Step Solution
- Step 1: Write the proportion equation
645,228.36 : 890,437.98 = 354,862.38 : x - Step 2: Convert to fraction form
645,228.36/890,437.98 = 354,862.38/x - Step 3: Cross multiply
645,228.36x = 890,437.98 × 354,862.38 - Step 4: Simplify right side
645,228.36x = 315,982,940,825.19 - Step 5: Solve for x
x = 315,982,940,825.19/645,228.36 - Step 6: Final answer
x = 489,722.65
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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.