Finding the Fourth Proportional to 717,910.36, 990,703.53 and 391,226.29
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Solution
The fourth proportional to 717,910.36, 990,703.53 and 391,226.29 is: 539,885.32
Step by Step Solution
- Step 1: Write the proportion equation
717,910.36 : 990,703.53 = 391,226.29 : x - Step 2: Convert to fraction form
717,910.36/990,703.53 = 391,226.29/x - Step 3: Cross multiply
717,910.36x = 990,703.53 × 391,226.29 - Step 4: Simplify right side
717,910.36x = 387,589,264,055.05 - Step 5: Solve for x
x = 387,589,264,055.05/717,910.36 - Step 6: Final answer
x = 539,885.32
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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.