Finding the Fourth Proportional to 1,220,620,163.36, 1,830,930,245.03 and 358,977,155.36
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Solution
The fourth proportional to 1,220,620,163.36, 1,830,930,245.03 and 358,977,155.36 is: 538,465,733.03
Step by Step Solution
- Step 1: Write the proportion equation
1,220,620,163.36 : 1,830,930,245.03 = 358,977,155.36 : x - Step 2: Convert to fraction form
1,220,620,163.36/1,830,930,245.03 = 358,977,155.36/x - Step 3: Cross multiply
1,220,620,163.36x = 1,830,930,245.03 × 358,977,155.36 - Step 4: Simplify right side
1,220,620,163.36x = 657,262,131,012,507,648 - Step 5: Solve for x
x = 657,262,131,012,507,648/1,220,620,163.36 - Step 6: Final answer
x = 538,465,733.03
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Double scale
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Similar ratio
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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.