Finding the Fourth Proportional to 717,805.70, 990,616.08 and 395,515.70
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Solution
The fourth proportional to 717,805.70, 990,616.08 and 395,515.70 is: 545,836.03
Step by Step Solution
- Step 1: Write the proportion equation
717,805.70 : 990,616.08 = 395,515.70 : x - Step 2: Convert to fraction form
717,805.70/990,616.08 = 395,515.70/x - Step 3: Cross multiply
717,805.70x = 990,616.08 × 395,515.70 - Step 4: Simplify right side
717,805.70x = 391,804,212,312.46 - Step 5: Solve for x
x = 391,804,212,312.46/717,805.70 - Step 6: Final answer
x = 545,836.03
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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.