Finding the Fourth Proportional to 2,129,990,613, 2,939,679,044.65 and 1,225,727,963.79
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Solution
The fourth proportional to 2,129,990,613, 2,939,679,044.65 and 1,225,727,963.79 is: 1,691,672,624.10
Step by Step Solution
- Step 1: Write the proportion equation
2,129,990,613 : 2,939,679,044.65 = 1,225,727,963.79 : x - Step 2: Convert to fraction form
2,129,990,613/2,939,679,044.65 = 1,225,727,963.79/x - Step 3: Cross multiply
2,129,990,613x = 2,939,679,044.65 × 1,225,727,963.79 - Step 4: Simplify right side
2,129,990,613x = 3,603,246,809,594,976,768 - Step 5: Solve for x
x = 3,603,246,809,594,976,768/2,129,990,613 - Step 6: Final answer
x = 1,691,672,624.10
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.