Finding the Fourth Proportional to 1,391,740,972.92, 1,920,610,135.39 and 819,548,989.56
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Solution
The fourth proportional to 1,391,740,972.92, 1,920,610,135.39 and 819,548,989.56 is: 1,130,982,076.71
Step by Step Solution
- Step 1: Write the proportion equation
1,391,740,972.92 : 1,920,610,135.39 = 819,548,989.56 : x - Step 2: Convert to fraction form
1,391,740,972.92/1,920,610,135.39 = 819,548,989.56/x - Step 3: Cross multiply
1,391,740,972.92x = 1,920,610,135.39 × 819,548,989.56 - Step 4: Simplify right side
1,391,740,972.92x = 1,574,034,095,797,569,280 - Step 5: Solve for x
x = 1,574,034,095,797,569,280/1,391,740,972.92 - Step 6: Final answer
x = 1,130,982,076.71
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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.