Finding the Fourth Proportional to 217,727,999.20, 326,591,998.80 and 212,689,151.20
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Solution
The fourth proportional to 217,727,999.20, 326,591,998.80 and 212,689,151.20 is: 319,033,726.80
Step by Step Solution
- Step 1: Write the proportion equation
217,727,999.20 : 326,591,998.80 = 212,689,151.20 : x - Step 2: Convert to fraction form
217,727,999.20/326,591,998.80 = 212,689,151.20/x - Step 3: Cross multiply
217,727,999.20x = 326,591,998.80 × 212,689,151.20 - Step 4: Simplify right side
217,727,999.20x = 69,462,575,013,483,416 - Step 5: Solve for x
x = 69,462,575,013,483,416/217,727,999.20 - Step 6: Final answer
x = 319,033,726.80
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.