Finding the Fourth Proportional to 391,743,858.63, 540,610,815.66 and 213,128,762.28
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Solution
The fourth proportional to 391,743,858.63, 540,610,815.66 and 213,128,762.28 is: 294,120,026.33
Step by Step Solution
- Step 1: Write the proportion equation
391,743,858.63 : 540,610,815.66 = 213,128,762.28 : x - Step 2: Convert to fraction form
391,743,858.63/540,610,815.66 = 213,128,762.28/x - Step 3: Cross multiply
391,743,858.63x = 540,610,815.66 × 213,128,762.28 - Step 4: Simplify right side
391,743,858.63x = 115,219,714,016,797,040 - Step 5: Solve for x
x = 115,219,714,016,797,040/391,743,858.63 - Step 6: Final answer
x = 294,120,026.33
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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.