Finding the Fourth Proportional to 1,390,297.62, 1,918,452.12 and 778,365.30
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Solution
The fourth proportional to 1,390,297.62, 1,918,452.12 and 778,365.30 is: 1,074,055.32
Step by Step Solution
- Step 1: Write the proportion equation
1,390,297.62 : 1,918,452.12 = 778,365.30 : x - Step 2: Convert to fraction form
1,390,297.62/1,918,452.12 = 778,365.30/x - Step 3: Cross multiply
1,390,297.62x = 1,918,452.12 × 778,365.30 - Step 4: Simplify right side
1,390,297.62x = 1,493,256,559,919.44 - Step 5: Solve for x
x = 1,493,256,559,919.44/1,390,297.62 - Step 6: Final answer
x = 1,074,055.32
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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.