Finding the Fourth Proportional to 280,552,738.60, 420,829,107.90 and 86,446,865.80
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Solution
The fourth proportional to 280,552,738.60, 420,829,107.90 and 86,446,865.80 is: 129,670,298.70
Step by Step Solution
- Step 1: Write the proportion equation
280,552,738.60 : 420,829,107.90 = 86,446,865.80 : x - Step 2: Convert to fraction form
280,552,738.60/420,829,107.90 = 86,446,865.80/x - Step 3: Cross multiply
280,552,738.60x = 420,829,107.90 × 86,446,865.80 - Step 4: Simplify right side
280,552,738.60x = 36,379,357,415,365,016 - Step 5: Solve for x
x = 36,379,357,415,365,016/280,552,738.60 - Step 6: Final answer
x = 129,670,298.70
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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.