Finding the Fourth Proportional to 280,420,126.80, 386,980,975.76 and 153,263,373.62
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Solution
The fourth proportional to 280,420,126.80, 386,980,975.76 and 153,263,373.62 is: 211,504,111.88
Step by Step Solution
- Step 1: Write the proportion equation
280,420,126.80 : 386,980,975.76 = 153,263,373.62 : x - Step 2: Convert to fraction form
280,420,126.80/386,980,975.76 = 153,263,373.62/x - Step 3: Cross multiply
280,420,126.80x = 386,980,975.76 × 153,263,373.62 - Step 4: Simplify right side
280,420,126.80x = 59,310,009,871,737,040 - Step 5: Solve for x
x = 59,310,009,871,737,040/280,420,126.80 - Step 6: Final answer
x = 211,504,111.88
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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.