Finding the Fourth Proportional to 1,311,753,911.64, 1,967,630,867.60 and 438,355,279.97
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Solution
The fourth proportional to 1,311,753,911.64, 1,967,630,867.60 and 438,355,279.97 is: 657,532,919.99
Step by Step Solution
- Step 1: Write the proportion equation
1,311,753,911.64 : 1,967,630,867.60 = 438,355,279.97 : x - Step 2: Convert to fraction form
1,311,753,911.64/1,967,630,867.60 = 438,355,279.97/x - Step 3: Cross multiply
1,311,753,911.64x = 1,967,630,867.60 × 438,355,279.97 - Step 4: Simplify right side
1,311,753,911.64x = 862,521,379,832,382,080 - Step 5: Solve for x
x = 862,521,379,832,382,080/1,311,753,911.64 - Step 6: Final answer
x = 657,532,919.99
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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.