Finding the Fourth Proportional to 485,719.80, 728,579.70 and 153,295.80
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Solution
The fourth proportional to 485,719.80, 728,579.70 and 153,295.80 is: 229,943.70
Step by Step Solution
- Step 1: Write the proportion equation
485,719.80 : 728,579.70 = 153,295.80 : x - Step 2: Convert to fraction form
485,719.80/728,579.70 = 153,295.80/x - Step 3: Cross multiply
485,719.80x = 728,579.70 × 153,295.80 - Step 4: Simplify right side
485,719.80x = 111,688,207,975.26 - Step 5: Solve for x
x = 111,688,207,975.26/485,719.80 - Step 6: Final answer
x = 229,943.70
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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.