Finding the Fourth Proportional to 991,435.81, 1,368,189.62 and 538,726.81
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Solution
The fourth proportional to 991,435.81, 1,368,189.62 and 538,726.81 is: 743,447.45
Step by Step Solution
- Step 1: Write the proportion equation
991,435.81 : 1,368,189.62 = 538,726.81 : x - Step 2: Convert to fraction form
991,435.81/1,368,189.62 = 538,726.81/x - Step 3: Cross multiply
991,435.81x = 1,368,189.62 × 538,726.81 - Step 4: Simplify right side
991,435.81x = 737,080,429,457.71 - Step 5: Solve for x
x = 737,080,429,457.71/991,435.81 - Step 6: Final answer
x = 743,447.45
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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.