Finding the Fourth Proportional to 720,389.13, 1,081,189.89 and 360,451.99
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Solution
The fourth proportional to 720,389.13, 1,081,189.89 and 360,451.99 is: 540,981.30
Step by Step Solution
- Step 1: Write the proportion equation
720,389.13 : 1,081,189.89 = 360,451.99 : x - Step 2: Convert to fraction form
720,389.13/1,081,189.89 = 360,451.99/x - Step 3: Cross multiply
720,389.13x = 1,081,189.89 × 360,451.99 - Step 4: Simplify right side
720,389.13x = 389,717,048,769.87 - Step 5: Solve for x
x = 389,717,048,769.87/720,389.13 - Step 6: Final answer
x = 540,981.30
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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.