Finding the Fourth Proportional to 720,985.23, 994,966.11 and 398,717.01
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Solution
The fourth proportional to 720,985.23, 994,966.11 and 398,717.01 is: 550,233.06
Step by Step Solution
- Step 1: Write the proportion equation
720,985.23 : 994,966.11 = 398,717.01 : x - Step 2: Convert to fraction form
720,985.23/994,966.11 = 398,717.01/x - Step 3: Cross multiply
720,985.23x = 994,966.11 × 398,717.01 - Step 4: Simplify right side
720,985.23x = 396,709,912,430.53 - Step 5: Solve for x
x = 396,709,912,430.53/720,985.23 - Step 6: Final answer
x = 550,233.06
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.