Finding the Fourth Proportional to 621,637.92, 857,989.80 and 406,378.80
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Solution
The fourth proportional to 621,637.92, 857,989.80 and 406,378.80 is: 560,887.38
Step by Step Solution
- Step 1: Write the proportion equation
621,637.92 : 857,989.80 = 406,378.80 : x - Step 2: Convert to fraction form
621,637.92/857,989.80 = 406,378.80/x - Step 3: Cross multiply
621,637.92x = 857,989.80 × 406,378.80 - Step 4: Simplify right side
621,637.92x = 348,668,865,336.24 - Step 5: Solve for x
x = 348,668,865,336.24/621,637.92 - Step 6: Final answer
x = 560,887.38
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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.