Finding the Fourth Proportional to 782,186,407.80, 1,173,421,329.30 and 393,029,878.20
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Solution
The fourth proportional to 782,186,407.80, 1,173,421,329.30 and 393,029,878.20 is: 589,616,026.99
Step by Step Solution
- Step 1: Write the proportion equation
782,186,407.80 : 1,173,421,329.30 = 393,029,878.20 : x - Step 2: Convert to fraction form
782,186,407.80/1,173,421,329.30 = 393,029,878.20/x - Step 3: Cross multiply
782,186,407.80x = 1,173,421,329.30 × 393,029,878.20 - Step 4: Simplify right side
782,186,407.80x = 461,189,642,132,061,056 - Step 5: Solve for x
x = 461,189,642,132,061,056/782,186,407.80 - Step 6: Final answer
x = 589,616,026.99
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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.