Finding the Fourth Proportional to 720,615.61, 994,438.74 and 398,318.59
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Solution
The fourth proportional to 720,615.61, 994,438.74 and 398,318.59 is: 549,673.68
Step by Step Solution
- Step 1: Write the proportion equation
720,615.61 : 994,438.74 = 398,318.59 : x - Step 2: Convert to fraction form
720,615.61/994,438.74 = 398,318.59/x - Step 3: Cross multiply
720,615.61x = 994,438.74 × 398,318.59 - Step 4: Simplify right side
720,615.61x = 396,103,436,758.18 - Step 5: Solve for x
x = 396,103,436,758.18/720,615.61 - Step 6: Final answer
x = 549,673.68
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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.