Finding the Fourth Proportional to 1,207,714,777.68, 1,811,123,615.51 and 420,566,290.43
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Solution
The fourth proportional to 1,207,714,777.68, 1,811,123,615.51 and 420,566,290.43 is: 630,693,235.32
Step by Step Solution
- Step 1: Write the proportion equation
1,207,714,777.68 : 1,811,123,615.51 = 420,566,290.43 : x - Step 2: Convert to fraction form
1,207,714,777.68/1,811,123,615.51 = 420,566,290.43/x - Step 3: Cross multiply
1,207,714,777.68x = 1,811,123,615.51 × 420,566,290.43 - Step 4: Simplify right side
1,207,714,777.68x = 761,697,540,475,607,936 - Step 5: Solve for x
x = 761,697,540,475,607,936/1,207,714,777.68 - Step 6: Final answer
x = 630,693,235.32
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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.