Finding the Fourth Proportional to 305,725.80, 458,588.70 and 139,513.80
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Solution
The fourth proportional to 305,725.80, 458,588.70 and 139,513.80 is: 209,270.70
Step by Step Solution
- Step 1: Write the proportion equation
305,725.80 : 458,588.70 = 139,513.80 : x - Step 2: Convert to fraction form
305,725.80/458,588.70 = 139,513.80/x - Step 3: Cross multiply
305,725.80x = 458,588.70 × 139,513.80 - Step 4: Simplify right side
305,725.80x = 63,979,452,174.06 - Step 5: Solve for x
x = 63,979,452,174.06/305,725.80 - Step 6: Final answer
x = 209,270.70
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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.