Finding the Fourth Proportional to 438,471,638.44, 605,013,955.48 and 250,213,978.60
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Solution
The fourth proportional to 438,471,638.44, 605,013,955.48 and 250,213,978.60 is: 345,251,404.28
Step by Step Solution
- Step 1: Write the proportion equation
438,471,638.44 : 605,013,955.48 = 250,213,978.60 : x - Step 2: Convert to fraction form
438,471,638.44/605,013,955.48 = 250,213,978.60/x - Step 3: Cross multiply
438,471,638.44x = 605,013,955.48 × 250,213,978.60 - Step 4: Simplify right side
438,471,638.44x = 151,382,948,909,174,080 - Step 5: Solve for x
x = 151,382,948,909,174,080/438,471,638.44 - Step 6: Final answer
x = 345,251,404.28
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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.