Finding the Fourth Proportional to 258,077,037.80, 387,115,556.70 and 212,727,405.80
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Solution
The fourth proportional to 258,077,037.80, 387,115,556.70 and 212,727,405.80 is: 319,091,108.70
Step by Step Solution
- Step 1: Write the proportion equation
258,077,037.80 : 387,115,556.70 = 212,727,405.80 : x - Step 2: Convert to fraction form
258,077,037.80/387,115,556.70 = 212,727,405.80/x - Step 3: Cross multiply
258,077,037.80x = 387,115,556.70 × 212,727,405.80 - Step 4: Simplify right side
258,077,037.80x = 82,350,088,121,613,808 - Step 5: Solve for x
x = 82,350,088,121,613,808/258,077,037.80 - Step 6: Final answer
x = 319,091,108.70
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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.