Finding the Fourth Proportional to 1,279,058,431.20, 1,918,587,646.80 and 734,862,847.20
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Solution
The fourth proportional to 1,279,058,431.20, 1,918,587,646.80 and 734,862,847.20 is: 1,102,294,270.80
Step by Step Solution
- Step 1: Write the proportion equation
1,279,058,431.20 : 1,918,587,646.80 = 734,862,847.20 : x - Step 2: Convert to fraction form
1,279,058,431.20/1,918,587,646.80 = 734,862,847.20/x - Step 3: Cross multiply
1,279,058,431.20x = 1,918,587,646.80 × 734,862,847.20 - Step 4: Simplify right side
1,279,058,431.20x = 1,409,898,780,730,195,968 - Step 5: Solve for x
x = 1,409,898,780,730,195,968/1,279,058,431.20 - Step 6: Final answer
x = 1,102,294,270.80
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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.