Finding the Fourth Proportional to 838,799,121.88, 1,258,505,489.86 and 390,316,406.44
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Solution
The fourth proportional to 838,799,121.88, 1,258,505,489.86 and 390,316,406.44 is: 585,617,375.45
Step by Step Solution
- Step 1: Write the proportion equation
838,799,121.88 : 1,258,505,489.86 = 390,316,406.44 : x - Step 2: Convert to fraction form
838,799,121.88/1,258,505,489.86 = 390,316,406.44/x - Step 3: Cross multiply
838,799,121.88x = 1,258,505,489.86 × 390,316,406.44 - Step 4: Simplify right side
838,799,121.88x = 491,215,340,287,167,040 - Step 5: Solve for x
x = 491,215,340,287,167,040/838,799,121.88 - Step 6: Final answer
x = 585,617,375.45
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.