Finding the Fourth Proportional to 885,912,816.80, 1,328,869,225.20 and 425,740,023.20
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Solution
The fourth proportional to 885,912,816.80, 1,328,869,225.20 and 425,740,023.20 is: 638,610,034.80
Step by Step Solution
- Step 1: Write the proportion equation
885,912,816.80 : 1,328,869,225.20 = 425,740,023.20 : x - Step 2: Convert to fraction form
885,912,816.80/1,328,869,225.20 = 425,740,023.20/x - Step 3: Cross multiply
885,912,816.80x = 1,328,869,225.20 × 425,740,023.20 - Step 4: Simplify right side
885,912,816.80x = 565,752,814,766,414,016 - Step 5: Solve for x
x = 565,752,814,766,414,016/885,912,816.80 - Step 6: Final answer
x = 638,610,034.80
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Double scale
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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.