Finding the Fourth Proportional to 851,638,521.20, 1,277,457,781.80 and 579,540,729.20
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Solution
The fourth proportional to 851,638,521.20, 1,277,457,781.80 and 579,540,729.20 is: 869,311,093.80
Step by Step Solution
- Step 1: Write the proportion equation
851,638,521.20 : 1,277,457,781.80 = 579,540,729.20 : x - Step 2: Convert to fraction form
851,638,521.20/1,277,457,781.80 = 579,540,729.20/x - Step 3: Cross multiply
851,638,521.20x = 1,277,457,781.80 × 579,540,729.20 - Step 4: Simplify right side
851,638,521.20x = 740,338,814,386,586,496 - Step 5: Solve for x
x = 740,338,814,386,586,496/851,638,521.20 - Step 6: Final answer
x = 869,311,093.80
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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.