Finding the Fourth Proportional to 390,876,136.40, 539,618,486.12 and 301,372,597.68
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Solution
The fourth proportional to 390,876,136.40, 539,618,486.12 and 301,372,597.68 is: 416,055,649.79
Step by Step Solution
- Step 1: Write the proportion equation
390,876,136.40 : 539,618,486.12 = 301,372,597.68 : x - Step 2: Convert to fraction form
390,876,136.40/539,618,486.12 = 301,372,597.68/x - Step 3: Cross multiply
390,876,136.40x = 539,618,486.12 × 301,372,597.68 - Step 4: Simplify right side
390,876,136.40x = 162,626,224,918,133,440 - Step 5: Solve for x
x = 162,626,224,918,133,440/390,876,136.40 - Step 6: Final answer
x = 416,055,649.79
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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.