Finding the Fourth Proportional to 1,440,930,943.28, 1,988,486,402.64 and 780,881,221.28
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Solution
The fourth proportional to 1,440,930,943.28, 1,988,486,402.64 and 780,881,221.28 is: 1,077,617,007.14
Step by Step Solution
- Step 1: Write the proportion equation
1,440,930,943.28 : 1,988,486,402.64 = 780,881,221.28 : x - Step 2: Convert to fraction form
1,440,930,943.28/1,988,486,402.64 = 780,881,221.28/x - Step 3: Cross multiply
1,440,930,943.28x = 1,988,486,402.64 × 780,881,221.28 - Step 4: Simplify right side
1,440,930,943.28x = 1,552,771,690,592,197,120 - Step 5: Solve for x
x = 1,552,771,690,592,197,120/1,440,930,943.28 - Step 6: Final answer
x = 1,077,617,007.14
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1.5x scale
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.