Finding the Fourth Proportional to 287,209.20, 430,813.80 and 129,745.20
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Solution
The fourth proportional to 287,209.20, 430,813.80 and 129,745.20 is: 194,617.80
Step by Step Solution
- Step 1: Write the proportion equation
287,209.20 : 430,813.80 = 129,745.20 : x - Step 2: Convert to fraction form
287,209.20/430,813.80 = 129,745.20/x - Step 3: Cross multiply
287,209.20x = 430,813.80 × 129,745.20 - Step 4: Simplify right side
287,209.20x = 55,896,022,643.76 - Step 5: Solve for x
x = 55,896,022,643.76/287,209.20 - Step 6: Final answer
x = 194,617.80
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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.