Finding the Fourth Proportional to 718,438.96, 991,424.55 and 396,148.99
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Solution
The fourth proportional to 718,438.96, 991,424.55 and 396,148.99 is: 546,673.91
Step by Step Solution
- Step 1: Write the proportion equation
718,438.96 : 991,424.55 = 396,148.99 : x - Step 2: Convert to fraction form
718,438.96/991,424.55 = 396,148.99/x - Step 3: Cross multiply
718,438.96x = 991,424.55 × 396,148.99 - Step 4: Simplify right side
718,438.96x = 392,751,834,143.71 - Step 5: Solve for x
x = 392,751,834,143.71/718,438.96 - Step 6: Final answer
x = 546,673.91
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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.