Finding the Fourth Proportional to 990,867.99, 1,367,352.09 and 561,151.20
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Solution
The fourth proportional to 990,867.99, 1,367,352.09 and 561,151.20 is: 774,362.75
Step by Step Solution
- Step 1: Write the proportion equation
990,867.99 : 1,367,352.09 = 561,151.20 : x - Step 2: Convert to fraction form
990,867.99/1,367,352.09 = 561,151.20/x - Step 3: Cross multiply
990,867.99x = 1,367,352.09 × 561,151.20 - Step 4: Simplify right side
990,867.99x = 767,291,266,126.01 - Step 5: Solve for x
x = 767,291,266,126.01/990,867.99 - Step 6: Final answer
x = 774,362.75
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1.5x scale
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.