Finding the Fourth Proportional to 280,420,143.24, 386,980,998.45 and 153,263,390.03
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Solution
The fourth proportional to 280,420,143.24, 386,980,998.45 and 153,263,390.03 is: 211,504,134.53
Step by Step Solution
- Step 1: Write the proportion equation
280,420,143.24 : 386,980,998.45 = 153,263,390.03 : x - Step 2: Convert to fraction form
280,420,143.24/386,980,998.45 = 153,263,390.03/x - Step 3: Cross multiply
280,420,143.24x = 386,980,998.45 × 153,263,390.03 - Step 4: Simplify right side
280,420,143.24x = 59,310,019,699,641,176 - Step 5: Solve for x
x = 59,310,019,699,641,176/280,420,143.24 - Step 6: Final answer
x = 211,504,134.53
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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.