Finding the Fourth Proportional to 1,638,687,304.65, 2,456,974,122.73 and 642,808,959.49
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Solution
The fourth proportional to 1,638,687,304.65, 2,456,974,122.73 and 642,808,959.49 is: 963,798,874.16
Step by Step Solution
- Step 1: Write the proportion equation
1,638,687,304.65 : 2,456,974,122.73 = 642,808,959.49 : x - Step 2: Convert to fraction form
1,638,687,304.65/2,456,974,122.73 = 642,808,959.49/x - Step 3: Cross multiply
1,638,687,304.65x = 2,456,974,122.73 × 642,808,959.49 - Step 4: Simplify right side
1,638,687,304.65x = 1,579,364,979,317,118,208 - Step 5: Solve for x
x = 1,579,364,979,317,118,208/1,638,687,304.65 - Step 6: Final answer
x = 963,798,874.16
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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.