Finding the Fourth Proportional to 645,219.74, 890,426.11 and 354,853.75
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Solution
The fourth proportional to 645,219.74, 890,426.11 and 354,853.75 is: 489,710.75
Step by Step Solution
- Step 1: Write the proportion equation
645,219.74 : 890,426.11 = 354,853.75 : x - Step 2: Convert to fraction form
645,219.74/890,426.11 = 354,853.75/x - Step 3: Cross multiply
645,219.74x = 890,426.11 × 354,853.75 - Step 4: Simplify right side
645,219.74x = 315,971,044,959.41 - Step 5: Solve for x
x = 315,971,044,959.41/645,219.74 - Step 6: Final answer
x = 489,710.75
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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.