Finding the Fourth Proportional to 717,770.16, 990,517.95 and 395,472.78
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Solution
The fourth proportional to 717,770.16, 990,517.95 and 395,472.78 is: 545,749.75
Step by Step Solution
- Step 1: Write the proportion equation
717,770.16 : 990,517.95 = 395,472.78 : x - Step 2: Convert to fraction form
717,770.16/990,517.95 = 395,472.78/x - Step 3: Cross multiply
717,770.16x = 990,517.95 × 395,472.78 - Step 4: Simplify right side
717,770.16x = 391,722,887,326.40 - Step 5: Solve for x
x = 391,722,887,326.40/717,770.16 - Step 6: Final answer
x = 545,749.75
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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.