Finding the Fourth Proportional to 386,984.99, 533,981.46 and 217,186.31
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Solution
The fourth proportional to 386,984.99, 533,981.46 and 217,186.31 is: 299,684.66
Step by Step Solution
- Step 1: Write the proportion equation
386,984.99 : 533,981.46 = 217,186.31 : x - Step 2: Convert to fraction form
386,984.99/533,981.46 = 217,186.31/x - Step 3: Cross multiply
386,984.99x = 533,981.46 × 217,186.31 - Step 4: Simplify right side
386,984.99x = 115,973,465,055.22 - Step 5: Solve for x
x = 115,973,465,055.22/386,984.99 - Step 6: Final answer
x = 299,684.66
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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.