Finding the Fourth Proportional to 1,388,462,720.36, 1,916,133,797.29 and 761,953,568.68
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Solution
The fourth proportional to 1,388,462,720.36, 1,916,133,797.29 and 761,953,568.68 is: 1,051,526,240.85
Step by Step Solution
- Step 1: Write the proportion equation
1,388,462,720.36 : 1,916,133,797.29 = 761,953,568.68 : x - Step 2: Convert to fraction form
1,388,462,720.36/1,916,133,797.29 = 761,953,568.68/x - Step 3: Cross multiply
1,388,462,720.36x = 1,916,133,797.29 × 761,953,568.68 - Step 4: Simplify right side
1,388,462,720.36x = 1,460,004,984,903,894,528 - Step 5: Solve for x
x = 1,460,004,984,903,894,528/1,388,462,720.36 - Step 6: Final answer
x = 1,051,526,240.85
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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.