Finding the Fourth Proportional to 1,279,057,005.55, 1,918,768,525.81 and 393,817,266.23
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Solution
The fourth proportional to 1,279,057,005.55, 1,918,768,525.81 and 393,817,266.23 is: 590,782,249.80
Step by Step Solution
- Step 1: Write the proportion equation
1,279,057,005.55 : 1,918,768,525.81 = 393,817,266.23 : x - Step 2: Convert to fraction form
1,279,057,005.55/1,918,768,525.81 = 393,817,266.23/x - Step 3: Cross multiply
1,279,057,005.55x = 1,918,768,525.81 × 393,817,266.23 - Step 4: Simplify right side
1,279,057,005.55x = 755,644,175,362,661,376 - Step 5: Solve for x
x = 755,644,175,362,661,376/1,279,057,005.55 - Step 6: Final answer
x = 590,782,249.80
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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.