Finding the Fourth Proportional to 772,439,722.20, 1,158,659,583.30 and 688,259,467.80
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Solution
The fourth proportional to 772,439,722.20, 1,158,659,583.30 and 688,259,467.80 is: 1,032,389,201.70
Step by Step Solution
- Step 1: Write the proportion equation
772,439,722.20 : 1,158,659,583.30 = 688,259,467.80 : x - Step 2: Convert to fraction form
772,439,722.20/1,158,659,583.30 = 688,259,467.80/x - Step 3: Cross multiply
772,439,722.20x = 1,158,659,583.30 × 688,259,467.80 - Step 4: Simplify right side
772,439,722.20x = 797,458,428,163,427,712 - Step 5: Solve for x
x = 797,458,428,163,427,712/772,439,722.20 - Step 6: Final answer
x = 1,032,389,201.70
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1.5x scale
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.