Finding the Fourth Proportional to 1,293,413,636.70, 1,940,120,455.05 and 373,319,991.90
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Solution
The fourth proportional to 1,293,413,636.70, 1,940,120,455.05 and 373,319,991.90 is: 559,979,987.85
Step by Step Solution
- Step 1: Write the proportion equation
1,293,413,636.70 : 1,940,120,455.05 = 373,319,991.90 : x - Step 2: Convert to fraction form
1,293,413,636.70/1,940,120,455.05 = 373,319,991.90/x - Step 3: Cross multiply
1,293,413,636.70x = 1,940,120,455.05 × 373,319,991.90 - Step 4: Simplify right side
1,293,413,636.70x = 724,285,752,564,290,304 - Step 5: Solve for x
x = 724,285,752,564,290,304/1,293,413,636.70 - Step 6: Final answer
x = 559,979,987.85
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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.