Finding the Fourth Proportional to 387,686,210, 581,534,380.30 and 128,901,430.24
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Solution
The fourth proportional to 387,686,210, 581,534,380.30 and 128,901,430.24 is: 193,353,829.52
Step by Step Solution
- Step 1: Write the proportion equation
387,686,210 : 581,534,380.30 = 128,901,430.24 : x - Step 2: Convert to fraction form
387,686,210/581,534,380.30 = 128,901,430.24/x - Step 3: Cross multiply
387,686,210x = 581,534,380.30 × 128,901,430.24 - Step 4: Simplify right side
387,686,210x = 74,960,613,353,757,568 - Step 5: Solve for x
x = 74,960,613,353,757,568/387,686,210 - Step 6: Final answer
x = 193,353,829.52
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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.