Finding the Fourth Proportional to 398,845.80, 549,287.46 and 390,136.68
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Solution
The fourth proportional to 398,845.80, 549,287.46 and 390,136.68 is: 537,293.32
Step by Step Solution
- Step 1: Write the proportion equation
398,845.80 : 549,287.46 = 390,136.68 : x - Step 2: Convert to fraction form
398,845.80/549,287.46 = 390,136.68/x - Step 3: Cross multiply
398,845.80x = 549,287.46 × 390,136.68 - Step 4: Simplify right side
398,845.80x = 214,297,186,010.03 - Step 5: Solve for x
x = 214,297,186,010.03/398,845.80 - Step 6: Final answer
x = 537,293.32
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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.