Finding the Fourth Proportional to 1,391,740,971, 1,920,610,132.74 and 819,548,987.64
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Solution
The fourth proportional to 1,391,740,971, 1,920,610,132.74 and 819,548,987.64 is: 1,130,982,074.06
Step by Step Solution
- Step 1: Write the proportion equation
1,391,740,971 : 1,920,610,132.74 = 819,548,987.64 : x - Step 2: Convert to fraction form
1,391,740,971/1,920,610,132.74 = 819,548,987.64/x - Step 3: Cross multiply
1,391,740,971x = 1,920,610,132.74 × 819,548,987.64 - Step 4: Simplify right side
1,391,740,971x = 1,574,034,089,938,192,896 - Step 5: Solve for x
x = 1,574,034,089,938,192,896/1,391,740,971 - Step 6: Final answer
x = 1,130,982,074.06
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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.