Finding the Fourth Proportional to 1,292,988,478.26, 1,784,324,031.73 and 698,272,905.34
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Solution
The fourth proportional to 1,292,988,478.26, 1,784,324,031.73 and 698,272,905.34 is: 963,616,572.50
Step by Step Solution
- Step 1: Write the proportion equation
1,292,988,478.26 : 1,784,324,031.73 = 698,272,905.34 : x - Step 2: Convert to fraction form
1,292,988,478.26/1,784,324,031.73 = 698,272,905.34/x - Step 3: Cross multiply
1,292,988,478.26x = 1,784,324,031.73 × 698,272,905.34 - Step 4: Simplify right side
1,292,988,478.26x = 1,245,945,125,704,432,640 - Step 5: Solve for x
x = 1,245,945,125,704,432,640/1,292,988,478.26 - Step 6: Final answer
x = 963,616,572.50
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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.