Finding the Fourth Proportional to 418,629,129.51, 628,038,201.50 and 138,509,380.93
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Solution
The fourth proportional to 418,629,129.51, 628,038,201.50 and 138,509,380.93 is: 207,795,340.45
Step by Step Solution
- Step 1: Write the proportion equation
418,629,129.51 : 628,038,201.50 = 138,509,380.93 : x - Step 2: Convert to fraction form
418,629,129.51/628,038,201.50 = 138,509,380.93/x - Step 3: Cross multiply
418,629,129.51x = 628,038,201.50 × 138,509,380.93 - Step 4: Simplify right side
418,629,129.51x = 86,989,182,487,892,960 - Step 5: Solve for x
x = 86,989,182,487,892,960/418,629,129.51 - Step 6: Final answer
x = 207,795,340.45
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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.