Finding the Fourth Proportional to 427,207.70, 640,811.55 and 371,911.70
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Solution
The fourth proportional to 427,207.70, 640,811.55 and 371,911.70 is: 557,867.55
Step by Step Solution
- Step 1: Write the proportion equation
427,207.70 : 640,811.55 = 371,911.70 : x - Step 2: Convert to fraction form
427,207.70/640,811.55 = 371,911.70/x - Step 3: Cross multiply
427,207.70x = 640,811.55 × 371,911.70 - Step 4: Simplify right side
427,207.70x = 238,325,312,940.14 - Step 5: Solve for x
x = 238,325,312,940.14/427,207.70 - Step 6: Final answer
x = 557,867.55
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.