Finding the Fourth Proportional to 885,919,780.80, 1,328,879,671.20 and 425,746,987.20
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Solution
The fourth proportional to 885,919,780.80, 1,328,879,671.20 and 425,746,987.20 is: 638,620,480.80
Step by Step Solution
- Step 1: Write the proportion equation
885,919,780.80 : 1,328,879,671.20 = 425,746,987.20 : x - Step 2: Convert to fraction form
885,919,780.80/1,328,879,671.20 = 425,746,987.20/x - Step 3: Cross multiply
885,919,780.80x = 1,328,879,671.20 × 425,746,987.20 - Step 4: Simplify right side
885,919,780.80x = 565,766,516,364,726,592 - Step 5: Solve for x
x = 565,766,516,364,726,592/885,919,780.80 - Step 6: Final answer
x = 638,620,480.80
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Double scale
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Similar ratio
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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.