Finding the Fourth Proportional to 330,603.80, 495,905.70 and 81,285.80
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Solution
The fourth proportional to 330,603.80, 495,905.70 and 81,285.80 is: 121,928.70
Step by Step Solution
- Step 1: Write the proportion equation
330,603.80 : 495,905.70 = 81,285.80 : x - Step 2: Convert to fraction form
330,603.80/495,905.70 = 81,285.80/x - Step 3: Cross multiply
330,603.80x = 495,905.70 × 81,285.80 - Step 4: Simplify right side
330,603.80x = 40,310,091,549.06 - Step 5: Solve for x
x = 40,310,091,549.06/330,603.80 - Step 6: Final answer
x = 121,928.70
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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.