Finding the Fourth Proportional to 1,916,497,636.80, 2,874,746,455.20 and 689,223,220.80
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Solution
The fourth proportional to 1,916,497,636.80, 2,874,746,455.20 and 689,223,220.80 is: 1,033,834,831.20
Step by Step Solution
- Step 1: Write the proportion equation
1,916,497,636.80 : 2,874,746,455.20 = 689,223,220.80 : x - Step 2: Convert to fraction form
1,916,497,636.80/2,874,746,455.20 = 689,223,220.80/x - Step 3: Cross multiply
1,916,497,636.80x = 2,874,746,455.20 × 689,223,220.80 - Step 4: Simplify right side
1,916,497,636.80x = 1,981,342,010,836,326,656 - Step 5: Solve for x
x = 1,981,342,010,836,326,656/1,916,497,636.80 - Step 6: Final answer
x = 1,033,834,831.20
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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.