Finding the Fourth Proportional to 1,287,724,901.08, 1,777,445,728.58 and 752,021,069.80
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Solution
The fourth proportional to 1,287,724,901.08, 1,777,445,728.58 and 752,021,069.80 is: 1,038,014,126.46
Step by Step Solution
- Step 1: Write the proportion equation
1,287,724,901.08 : 1,777,445,728.58 = 752,021,069.80 : x - Step 2: Convert to fraction form
1,287,724,901.08/1,777,445,728.58 = 752,021,069.80/x - Step 3: Cross multiply
1,287,724,901.08x = 1,777,445,728.58 × 752,021,069.80 - Step 4: Simplify right side
1,287,724,901.08x = 1,336,676,638,318,171,904 - Step 5: Solve for x
x = 1,336,676,638,318,171,904/1,287,724,901.08 - Step 6: Final answer
x = 1,038,014,126.46
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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.