Finding the Fourth Proportional to 919,724,547.20, 1,379,586,820.80 and 853,211,753.60
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Solution
The fourth proportional to 919,724,547.20, 1,379,586,820.80 and 853,211,753.60 is: 1,279,817,630.40
Step by Step Solution
- Step 1: Write the proportion equation
919,724,547.20 : 1,379,586,820.80 = 853,211,753.60 : x - Step 2: Convert to fraction form
919,724,547.20/1,379,586,820.80 = 853,211,753.60/x - Step 3: Cross multiply
919,724,547.20x = 1,379,586,820.80 × 853,211,753.60 - Step 4: Simplify right side
919,724,547.20x = 1,177,079,690,618,216,960 - Step 5: Solve for x
x = 1,177,079,690,618,216,960/919,724,547.20 - Step 6: Final answer
x = 1,279,817,630.40
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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.