Finding the Fourth Proportional to 1,388,221,056.21, 1,915,780,310.16 and 761,689,318.08
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Solution
The fourth proportional to 1,388,221,056.21, 1,915,780,310.16 and 761,689,318.08 is: 1,051,150,601.35
Step by Step Solution
- Step 1: Write the proportion equation
1,388,221,056.21 : 1,915,780,310.16 = 761,689,318.08 : x - Step 2: Convert to fraction form
1,388,221,056.21/1,915,780,310.16 = 761,689,318.08/x - Step 3: Cross multiply
1,388,221,056.21x = 1,915,780,310.16 × 761,689,318.08 - Step 4: Simplify right side
1,388,221,056.21x = 1,459,229,398,036,861,440 - Step 5: Solve for x
x = 1,459,229,398,036,861,440/1,388,221,056.21 - Step 6: Final answer
x = 1,051,150,601.35
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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.